【天文台编号列表】
天文台是观测天文事件的场所，天文台编号是小行星中心 (国际天文联合会的服务项目) 赋予观测太阳系天体的天文台的序号。以下是这些天文台代码的清单 (斜体字不是IAU本身清单中的部分，分类是另加的)：
== 000-099 ==
* 000: 格林尼治，英国，英格兰格林尼治的皇家天文台
* 001: 克劳波罗 (Crowborough)，英国，英格兰的(Isaac Roberts)
* 002: 雷利 (Rayleigh)，英格兰，爱赛克斯辰斯福自治区， (雷利天文台)
* 003: 蒙特佩利尔 (Montpellier)，法国 (Observatoire de la Babote)
* 004: 土鲁斯 (Toulouse)，法国 (Observatoire de Toulouse)
* 005: 默顿 (Meudon)，法国 (Observatoire de Paris-Meudon)
* 006: 法布拉天文台，西班牙巴塞隆纳的法布拉天文台
* 007: 巴黎，法国 (巴黎天文台)
* 008: Algiers-Bouzaréah, Algeria (CRAAG: Centre de Recherche en Astronomie, Astrophysique et Geophysique)
* 009: Berne-Uecht, Switzerland (Sternwarte Uecht, Solar Observatory at Uecht)
* 010: Caussols, France (CERGA: Centre de recherches en géodynamique et astrométrie)
* 011: Wetzikon, Switzerland (Sternwarte Wetzikon)
* 012: Uccle, Belgium (Observatoire Royal de Belgique/Koninklijke Sterrenwacht van België)
* 013: Leiden, Netherlands (Sterrewacht Leiden)
* 014: Marseilles, France (Observatoire de Marseille)
* 015: Utrecht, Netherlands (Museum Sterrenwacht Sonnenborgh)
* 016: Besançon, France (Observatoire de Besançon)
* 017: Hoher List, Germany (Observatorium Hoher List)
* 018: Düsseldorf-Bilk, Germany (Sternwarte Bilk)
* 019: Neuchâtel, Switzerland (Observatoire Cantonal de Neuchâtel)
* 020: Nice, France (Observatoire de Nice)
* 021: Karlsruhe, Germany (Sternwarte Karlsruhe)
* 022: Pino Torinese, Italy (Osservatorio Astronomico di Torino)
* 023: Wiesbaden, Germany (Sternwarte Wiesbaden)
* 024: Heidelberg-Königstuhl, Germany (Landessternwarte Heidelberg-Königstuhl)
* 025: Stuttgart, Germany (Sternwarte Stuttgart)
* 026: Berne-Zimmerwald, Switzerland (Observatorium Zimmerwald)
* 027: Milan, Italy (Osservatorio Astronomico di Brera)
* 028: Würzburg, Germany (Sternwarte der Universität Würzburg)
* 029: Hamburg-Bergedorf, Germany (Hamburger Sternwarte)
* 030: Arcetri Observatory, Florence, Italy (Osservatorio Astrofisico di Arcetri)
* 031: Sonneberg, Germany (Sternwarte Sonneberg)
* 032: Jena, Germany (Astrophysikalisches Institut und Universitäts-Sternwarte Jena)
* 033: Karl Schwarzschild Observatory, Tautenburg, Germany (Karl-Schwarzschild-Observatorium)
* 034: Monte Mario Observatory, Rome, Italy (Osservatorio Astronomico di Roma Sede di Monte Mario)
* 035: Copenhagen (Copenhagen University Observatory, Københavns Universitet Astronomisk Observatorium), Denmark
* 036: Castel Gandolfo, Vatican City (Specola Vaticana)
* 037: Collurania Observatory, Teramo, Italy (Osservatorio Astronomico di Collurania-Teramo)
* 038: Trieste, Italy (Osservatorio Astronomico di Trieste)
* 039: Lund, Sweden (Lunds Universitet Institutionen för astronomi, Lund Observatory)
* 040: Lohrmann Institute, Dresden, Germany
* 041: Innsbruck, Austria (Universitäts-Sternwarte Innsbruck)
* 042: Potsdam, Germany (Einstein Tower)
* 043: Asiago Astrophysical Observatory, Padua, Italy (Osservatorio Astrofisico di Asiago)
* 044: Capodimonte Observatory, Naples, Italy (Osservatorio Astronomico di Capodimonte)
* 045: Vienna (since 1879), Austria (Universitäts-Sternwarte Wien)
* 046: 克列特天文台, České Budějovice, 捷克 (Hvězdárna Kleť)
* 047: Poznań, Poland (Obserwatorium Astronomiczne Uniwersytet im. Adama Mickiewicza w Poznaniu, Poznań Observatory)
* 048: 赫拉德茨-克拉洛韦, 捷克 (赫拉德茨-克拉洛韦天文台)
* 049: Uppsala-Kvistaberg, Sweden (Kvistabergs Observatorium)
* 050: Stockholm (before 1931), Sweden (Stockholms observatorium)
* 051: Cape, South Africa (Royal Observatory at the Cape of Good Hope)
* 052: Stockholm-Saltsjöbaden (since 1931), Sweden (Stockholms observatorium, Saltsjöbaden Observatory)
* 053: Konkoly Observatory, Budapest (since 1934), Hungary (Konkoly Obszervatórium)
* 054: Brorfelde, Denmark (Brorfelde Observatoriet)
* 055: Kraków (Cracow), Poland (Kraków Observatory)
* 056: Skalnaté Pleso，斯洛伐克（岩湖天文台）
* 057: Belgrade, Serbia (Belgrade Astronomical Observatory (AOB); Астрономске опсерваторије у Београду; Astronomske opservatorije u Beogradu)
* 058: Königsberg, German Empire (before 1944)
* 059: Lomnický štít (Lomnický peak, Slovakia)
* 060: Warsaw-Ostrowik, Poland (Warsaw University Observatory)
* 061: Uzhgorod, Ukraine
* 062: Turku, Finland (Iso-Heikkilä Observatory, University of Turku; Turun observatorio, Turun yliopisto)
* 063: Turku-Tuorla, Finland (Tuorla Observatory, University of Turku; Tuorlan observatorio, Turun yliopisto)
* 064: Turku-Kevola, Finland (Kevola Observatory, University of Turku; Kevolan tähtitorni, Turun yliopisto)
* 065: Traunstein, Germany
* 066: Athens, Greece (National Observatory of Athens)
* 067: Lvov University Observatory, Ukraine
* 068: Lvov Polytechnic Institute, Ukraine
* 069: Baldone, near Riga, Latvia
* 070: Vilno (before 1883), Russian Empire
* 071: Smolyan, Bulgaria (Bulgarian National Astronomical Observatory - Rozhen, Национална Астрономическа Обсерватория Рожен, a.k.a. Rozhen National Astronomical Observatory)
* 072: Scheuren Observatory, Germany
* 073: Bucharest, Romania
* 074: Boyden Observatory, Bloemfontein, South Africa
* 075: Tartu, Estonia (Tartu Observatory)
* 076: Johannesburg-Hartbeespoort, South Africa (Union Observatory Annex, Hartbeespoort)
* 077: Yale-Columbia Station, Johannesburg, South Africa (Yale-Columbia Southern Station, 1925–1951 )
* 078: Johannesburg, South Africa (Union Observatory)
* 079: Radcliffe Observatory, Pretoria, South Africa
* 080: Istanbul, Turkey
* 081: Leiden Station, Johannesburg, South Africa (Leiden Southern Station, Hartbeespoort)
* 082: St. Pölten , Austria
* 083: Golosseevo-Kiev, Ukraine
* 084: Pulkovo Observatory, Russia
* 085: Kiev, Ukraine
* 086: Odessa, Ukraine
* 087: Helwan, Egypt
* 088: Kottomia, Egypt
* 089: Nikolaev, Ukraine (Nikolaev Astronomical Observatory)
* 090: Mainz, Germany
* 091: Observatoire de Nurol, Aurec sur Loire, France
* 092: Torun-Piwnice, Poland (Piwnice Obserwatorium Astronomiczne; Piwnice Astronomical Observatory)
* 093: Skibotn, Norway
* 094: Crimea-Simeïs, Ukraine (Crimean Astrophysical Observatory-Simeis)
* 095: Crimea-Nauchnij, Ukraine (Crimean Astrophysical Observatory-Nauchnij)
* 096: Merate, Italy
* 097: Wise Observatory, Mitzpeh Ramon, Israel
* 098: Asiago Observatory, Cima Ekar, Italy (Stazione osservativa di Asiago Cima Ekar)
* 099: Lahti, Finland (Lahti Ursa Observatory; Lahden Ursan tähtitorni)
== 100-199 ==
* 100: Ähtäri, Finland
* 101: Kharkov, Ukraine (Astronomical Observatory of Kharkov National University, Астрономiчна обсерваторiя Харкiвського нацiонального унiверситету, a.k.a. ХАО, Харкiвська астрономiчна обсерваторiя)
* 102: Zvenigorod, Russia
* 103: Ljubljana, Slovenia
* 104: San Marcello Pistoiese, Italy (Osservatorio Astronomico della Montagna Pistoiese, Pistoia Mountains Astronomical Observatory; a.k.a. Osservatorio di Pian dei Termini, Pian dei Termini Observatory)
* 105: Moscow, Russia
* 106: Črni Vrh Observatory, Slovenia (Observatorij Črni Vrh)
* 107: Cavezzo, Italy (Osservatorio Astronomico "Geminiamo Montanari")
* 108: Montelupo, Italy (Osservatorio di Montelupo)
* 109: Algiers-Kouba, Algeria
* 110: Астрономическая обсерватория гимназии имени А. Л. Кекина, Russia
* 111: Piazzano Observatory, Florence, Italy
* 112: Pleiade Observatory, Verona, Italy
* 113: Volkssternwarte Drebach, Schönbrunn, Germany
* 114: Engelhardt Observatory, Zelenchukskaya Station,  Russia (Kazan University Observatory (Обсерватория Казанского Университета); V. P. Engelhardt Astronomical Observatory (Астрономическая Обсерватория им. В. П. Энгельгардта))
* 115: Zelenchukskaya, Russia (Special Astrophysical Observatory (SAO); Специальная астрофизическая обсерватория (САО))
* 116: Giesing, Germany (München-Giesing)
* 117: Sendling, Munich, Germany
* 118: Astronomical and Geophysical Observatory, Modra, Slovakia (Astronomické observatórium Modra, Modra Observatory)
* 119: Abastuman, Georgia
* 120: Višnjan Observatory, Croatia (Zvjezdarnica Višnjan)
* 121: Kharkov University, Chuguevskaya Station, Ukraine
* 122: Pises Observatory, France (Observatoire des Pises)
* 123: 布拉堪天文台，布拉堪, 亚美尼亚
* 124: Castres, France (Observatoire de Castres)
* 125: Tbilisi, Georgia
* 126: Monte Viseggi, Italy (Osservatorio Astronomico di Monte Viseggi)
* 127: Bornheim, Germany
* 128: Saratov, Russia
* 129: Ordubad, Azerbaijan
* 130: 卢梅扎内（Lumezzane） (Osservatorio Astronomico "Serafino Zani", 卢梅扎内, 意大利)
* 131: Observatoire de l'Ardèche, France
* 132: Bédoin, France (Observatoire de Bédoin)
* 133: Les Tardieux, France
* 134: Groszschwabhausen
* 135: Kasan, Russia
* 136: Engelhardt Observatory, Kasan, Russia (Kazan University Observatory (Обсерватория Казанского Университета); V. P. Engelhardt Astronomical Observatory (Астрономическая Обсерватория им. В. П. Энгельгардта))
* 137: Givatayim Observatory, Israel
* 138: Village-Neuf, France
* 139: Antibes, France
* 140: Augerolles, France
* 141: Hottviller, France (Observatoire de Hottviller)
* 142: Sinsen, Germany
* 143: Gnosca, Switzerland (Osservatorio Astronomico di Gnosca)
* 144: Bray et Lu, France
* 145: 's-Gravenwezel, Belgium
* 146: Frignano, Italy
* 147: Osservatorio Astronomico "Galileo Galilei" di Suno, Italy
* 148: Guitalens, France (Observatoire de Guitalens)
* 149: Beine-Nauroy, France
* 150: Maisons Laffitte, France
* 151: Eschenberg Observatory, Winterthur, Switzerland (Sternwarte Eschenberg)
* 152: Moletai Astronomical Observatory, Lithuania (MAO; Molėtų astronomijos observatorija)
* 153: Stuttgart-Hoffeld, Germany
* 154: Cortina, Italy (Cortina d'Ampezzo, Associazione Astronomica Cortina: Osservatorio Astronomico del Col Drusciè "Helmut Ullrich")
* 155: Ole Romer Observatory, Aarhus
* 156: Catania Astrophysical Observatory, Sicily, Italy
* 157:  Frasso Sabino date=20201202084643  (Osservatorio Astronomico Virginio Cesarini - Frasso Sabino, Italy)
* 158: Promiod (Osservatorio Dalai Lama di Promiod, Italy)
* 159: Monte Agliale (Osservatorio Astronomico di Monte Agliale, Italy)
* 160:  Castelmartini date=20190521095844 , Italy
* 161: Cerrina Tololo Observatory, Italy
* 162: Potenza, Italy
* 163: Roeser Observatory, Luxembourg
* 164: St. Michel sur Meurthe, France
* 165: Piera Observatory, Barcelona, Spain (Observatori Astronomic de Piera)
* 166: Úpice, Czech Republic (Hvězdárna v Úpici)
* 167: Bülach Observatory, Switzerland
* 168: Kourovskaya, Russia
* 169: Airali Observatory, Italy
* 170: Observatorio de Begues, Spain
* 171: Flarestar Observatory, San Gwann, Malta
* 172: Onnens, Switzerland
* 173: St. Clotilde, Réunion, France (Observatoire Sainte-Clotilde)
* 174: Nyrölä Observatory, Jyväskylä, Finland (Nyrölän observatorio)
* 175: F.-X. Bagnoud Observatory, St-Luc, Switzerland (Bagnoud Observatory)
* 176: Observatorio Astronómico de Consell (Consell Observatory, Majorca, Spain)
* 177: Le Cres, France
* 178: Collonges, France
* 179: Monte Generoso, Switzerland
* 180: Mauguio, France
* 181: Observatoire des Makes, Saint-Louis, Réunion, France
* 182: St. Paul, Réunion, France
* 183: Starlab Observatory, Karachay-Cherkessia, Russia
* 184: Valmeca Observatory, Puimichel, France
* 185: Observatoire Astronomique Jurassien-Vicques, Switzerland
* 186: Kitab, Mt. Maydanak, Uzbekistan
* 187: Borowiec Astrogeodynamic Observatory, Borowiec, Poland
* 188: Majdanak, Uzbekistan
* 189: Geneva (before 1967), Switzerland
* 190: Gissar, Tajikistan
* 191: Dushanbe, Tajikistan
* 192: Tashkent, Uzbekistan
* 193: Sanglok, Tajikistan
* 194: Tivoli, Namibia
* 195: Untermenzing Observatory, Munich, Germany
* 196: Homburg-Erbach, Germany
* 197: Bastia, Italy
* 198: Wildberg (Observatorium Wildberg, Germany)
* 199: Buthiers (Observatoire de Buthiers, France)
== 200-299 ==
* 200: Beersel Hills Observatory
* 201: Jonathan B. Postel Observatory, Bareggio, Italy
* 202: Tamaris Observatoire, La Seyne sur Mer
* 203: GiaGa Observatory
* 204: Schiaparelli Observatory
* 205: Obs. Casalecchio di Reno, Bologna
* 206: Haagaar Observatory, Eina
* 207: Osservatorio Antonio Grosso
* 208: Rivalta
* 209: Asiago Observatory, Cima Ekar-ADAS (Asiago-DLR Asteroid Survey)
* 210: Alma-Ata
* 211: Scandicci
* 212: Observatorio La Dehesilla
* 213: Observatorio Montcabre
* 214: Garching Observatory
* 215: Buchloe
* 216: Observatoire des Côtes de Meuse, France
* 217: Assah
* 218: Hyderabad
* 219: Japal-Rangapur
* 220: Vainu Bappu Observatory, Kavalur, India
* 221: IAS Observatory, Hakos
* 222: Yerres-Canotiers
* 223: Madras, India (Indian Institute of Astrophysics, Madras Observatory)
* 224: Ottmarsheim
* 225: Northwood Ridge Observatory
* 226: Guido Ruggieri Observatory, Padua
* 227: OrbitJet Observatory, Colden
* 228: Bruno Zugna Observatory, Trieste
* 229: G. C. Gloriosi Astronomical Observatory, Salerno
* 230: Mt. Wendelstein Observatory
* 231: Vesqueville
* 232: Masquefa Observatory
* 233: Sauro Donati Astronomical Observatory, San Vito
* 234: Coddenham Observatory
* 235: CAST Observatory, Talmassons
* 236: Tomsk
* 237: Baugy
* 238: Grorudalen Optical Observatory
* 239: Michael Adrian Observatory, Trebur
* 240: Herrenberg Sternwarte
* 241: Schaerding
* 242: Varennes
* 243: Umbrella Observatory
* 244: Geocentric Occultation Observation
* 245: Spitzer Space Telescope
* 246: Kleť Observatory-KLENOT
* 247: Roving Observer
* 248: Hipparcos
* 249: SOHO
* 250: Hubble Space Telescope
* 251: Arecibo Observatory
* 252: Deep Space Communications Complex
* 253: Deep Space Communications Complex
* 254: Haystack, Westford
* 255: Evpatoria, Ukraine
* 256: Green Bank Telescope
* 257: Goldstone DSS 25, Fort Irwin
* 260: 赛丁泉天文台-DSS (数位巡天)
* 261: 帕洛玛山天文台-DSS
* 262: 欧洲南天天文台，拉西拉-DSS (拉西拉天文台)
* 285: Flammarion Observatory, Juvisy
* 286: 云南天文台
* 290: Mt. Graham-VATT (Vatican Advanced Technology Telescope)
* 291: LPL/Spacewatch II
* 292: Burlington, New Jersey
* 293: Burlington remote site
* 294: Astrophysical Obs., College of Staten Island
* 295: Catholic University Observatory, Washington
* 296: Dudley Observatory (after 1893)
* 297: Middlebury
* 298: Van Vleck Observatory
* 299: Bosscha Observatory, Lembang, Indonesia
== 300-399 ==
* 300: Bisei Spaceguard Center-BATTeRS
* 301: Mont Mégantic (Observatoire du Mont Mégantic, QC)
* 302: University of the Andes station
* 303: Mérida (Observatorio Astronómico Nacional de Llano del Hato, Mérida, Venezuela)
* 304: Las Campanas Observatory
* 305: Purple Mountain, Hainan Island station
* 306: Observatorio Taya Beixo, Barquisimeto
* 309: Cerro Paranal (Paranal Observatory)
* 312: Tsingtao field station, Xisha Islands
* 318: Quinns Rock
* 319: 伯斯天文台，伯斯-罗威尔望远镜
* 320: Chiro Observatory
* 321: Craigie
* 322: 伯斯天文台，Bickley-MCT
* 323: 伯斯天文台，Bickley
* 324: 北京天文台，沙河站
* 327: 北京天文台，兴隆站 (Xinglong Station (NAOC))
* 330: 紫金山天文台，南京
* 333: Desert Eagle Observatory, Arizona
* 334: Tsingtao
* 337: Sheshan, formerly Zô-Sé
* 340: Toyonaka
* 341: Akashina
* 342: Shishikui
* 343: Younchun
* 344: Bohyunsan Optical Astronomy Observatory (BOAO)
* 345: Sobaeksan Optical Astronomy Observatory
* 346: KNUE Astronomical Observatory
* 347: Utsunomiya-Imaizumi
* 348: Ayabe
* 349: Ageo
* 350: Kurohone
* 351: Sakamoto
* 352: Konan
* 353: Nishi Kobe
* 354: Kawachi
* 355: Hadano
* 356: Kogota
* 357: Shimotsuma
* 358: Nanyo
* 359: Wakayama
* 360: Kuma Kogen
* 361: Sumoto
* 362: Ray Observatory
* 363: Yamada
* 364: YCPM Kagoshima Station
* 365: Uto Observatory
* 366: Miyasaka Observatory
* 367: Yatsuka
* 368: Ochiai
* 369: Chichibu
* 370: Kochi
* 371: Tokyo-Okayama (Okayama Astrophysical Observatory of Tokyo Observatory) (OAO)
* 372: Geisei Observatory
* 373: Oishi
* 374: Minami-Oda Observatory
* 375: Uzurano
* 376: Uenohara
* 377: Kwasan Observatory, Kyoto University, Kyoto ( Kwasan and Hida Observatories)
* 378: Murou
* 379: Hamamatsu-Yuto
* 380: Ishiki
* 381: Tokyo-Kiso (Kiso Observatory, University of Tokyo, Nagano)
* 382: Tokyo-Norikura (Norikura Observatory of Tokyo Astronomical Observatory)
* 383: Chirorin
* 384: Shimada
* 385: Nihondaira Observatory
* 386: Yatsugatake-Kobuchizawa
* 387: Tokyo-Dodaira (Dodaira Observatory of Tokyo Astronomical Observatory)
* 388: Tokyo-Mitaka (National Astronomical Observatory, Mitaka, Tokyo)
* 389: Tokyo (before 1938) (Tokyo Astronomical Observatory)
* 390: Utsunomiya
* 391: Sendai Observatory, Ayashi Station
* 392: JCPM Sapporo Station
* 393: JCPM Sakura Station
* 394: JCPM Hamatonbetsu Station
* 395: Tokyo-Asahikawa
* 396: Asahikawa
* 397: Sapporo Science Center
* 398: Nagatoro
* 399: Kushiro
== 400-499 ==
* 400: Kitami
* 401: Oosato
* 402: Dynic Astronomical Observatory
* 403: Kani
* 404: Yamamoto
* 405: Kamihoriguchi
* 406: Bibai
* 407: Kahoku
* 408: Nyukasa
* 409: Kiyose and Mizuho
* 410: Sengamine (Sengamine Observatory, Hyōgo, Japan)
* 411: 大泉天文台（Oizumi Observatory）
* 412: Iwaki
* 413: Siding Spring Observatory
* 414: Mount Stromlo
* 415: Kambah, near Canberra (Kambah Observatory)
* 416: Barton, near Canberra
* 417: Yanagida Astronomical Observatory
* 418: Tamworth
* 419: Windsor
* 420: Sydney
* 421: Mt. Kajigamori, Otoyo
* 422: Loomberah
* 423: North Ryde
* 424: Macquarie, near Canberra
* 425: Taylor Range Observatory, Brisbane
* 426: Woomera
* 427: Stockport
* 428: Reedy Creek
* 429: Hawker
* 430: Rainbow Observatory, near Coonabarabran
* 431: Mt. Tarana Observatory, Bathurst
* 432: Boambee
* 433: Bagnall Beach Observatory
* 434: S. Benedetto Po
* 435: G. Colombo Astronomical Observatory, Padua
* 436: Osservatorio di Livergnano
* 437: Haverford
* 438: Smith College Observatory, Northampton
* 439: ROTSE-III, Los Alamos
* 440: Elginfield Observatory
* 441: Swilken Brae, St. Andrews
* 442: Gualba Observatory
* 443: Obs. Astronomico Plomer, Buenos Aires
* 444: Star Cruiser Observatory
* 445: Observatori d'Ontinyent
* 446: Kingsnake Observatory
* 447: Centennial Observatory
* 448:  Desert Moon Observatory date=20210226151229 , Las Cruces, New Mexico
* 449: Griffin Hunter Observatory
* 450: Carla Jane Observatory, Charlotte
* 451: West Skies Observatory, Mulvane
* 452: Big Cypress Observatory
* 453: Edwards Raven Observatory
* 454: Maryland Space Grant Consortium Observatory
* 455: CBA Concord
* 456: Daventry Observatory
* 457: Partizanske
* 458: Guadarrama Observatory
* 459: Smith River Observatory, Danbury
* 460: Area 52 Observatory, Nashville
* 461: University of Szeged, Piszkéstető Stn. (Konkoly)
* 462: Mount Belleview Observatory
* 463: Sommers-Bausch Observatory, Boulder
* 464: Toby Point Observatory, Narragansett
* 465: Takapuna
* 466: Mount Molehill Observatory, Auckland
* 467: Auckland Observatory (Stardome Observatory)
* 468: Astronomical Observatory, Campo Catino (Osservatorio Astronomico Campo Catino)
* 469: Courroux
* 470: Ceccano
* 471: Houstrup
* 472: Merlette
* 473: Remanzacco
* 474: Mount John Observatory, Lake Tekapo (Mount John University Observatory)
* 475: Turin Observatory (before 1913)
* 476:  Grange Observatory, Bussoleno, Italy
* 477: Galleywood
* 478: Lamalou-les-Bains
* 479: Sollies-Pont
* 480: Cockfield
* 481: Moorwarfen
* 482: St. Andrews
* 483: Carter Observatory, Black Birch Station
* 484: Happy Valley, Wellington
* 485: Carter Observatory, Wellington
* 486: Palmerston North
* 487: Macnairston Observatory
* 488: Newcastle-upon-Tyne
* 489: Hemingford Abbots
* 490: Wimborne Minster
* 491: Centro Astronómico de Yebes, Spain
* 492: Mickleover
* 493: 卡拉阿托天文台
* 494: Stakenbridge
* 495: Altrincham
* 496: Bishopstoke
* 497: Ascot-Loudwater
* 498: Earls Barton
* 499: Cheam
== 500-599 ==
* 500: Geocentric
* 501: Herstmonceux
* 502: Colchester
* 503: Cambridge
* 504:  Le Creusot date=20201127042915 , France
* 505: Simon Stevin
* 506: Bendestorf
* 507: Nyenheim
* 508: Zeist
* 509: La Seyne sur Mer
* 510: Siegen
* 511: Observatoire de Haute-Provence, France
* 512: Leiden (before 1860)
* 513: Lyons
* 514: Mundenheim (1907-1913)
* 515: Volkssternwarte Dhaun, near Kirn
* 516: Hamburg (before 1909), German Empire
* 517: Geneva (from 1967), Switzerland
* 518: Marine Observatory, Hamburg
* 519: Meschede
* 520: Bonn
* 521: Bamberg
* 522: Observatory of Strasbourg (Observatoire de Strasbourg)
* 523: Frankfurt
* 524: Mannheim
* 525: Marburg
* 526: Kiel
* 527: Altona
* 528: Göttingen
* 529: Christiania
* 530: Lübeck
* 531: Collegio Romano, Rome (Osservatorio del Collegio Romano)
* 532: Munich, Germany (Universitäts-Sternwarte München, Bogenhausener Sternwarte; a.k.a.  Königlichen Sternwarte zu Bogenhausen)
* 533: Padua
* 534: Leipzig (since 1861)
* 535: Palermo (Osservatorio Astronomico di Palermo "Giuseppe S. Vaiana", Sicily)
* 536: Berlin-Babelsberg (Berlin Observatory after 1913)
* 537: Urania Observatory, Berlin (Urania Sternwarte)
* 538: Pola, Croatia (Kaiserlichen und Koniglichen Kriegsmarine Pola Sternwarte; Austro-Hungarian Imperial and Royal Naval Observatory in Pola, now Pula, Croatia)
* 539:  Kremsmünster
* 540: Linz (Davidschlag Observatory; Private Observatory Meyer/Obermair; Sternwarte Davidschlag, Austria)
* 541: Prague Observatory
* 542: Falkensee
* 543: Leipzig (before 1861), German Empire
* 544: Wilhelm Foerster Observatory, Berlin (Wilhelm-Foerster-Sternwarte)
* 545: Vienna Observatory (before 1879), Austria-Hungary
* 546: Oppolzer Observatory, Vienna
* 547: Breslau
* 548: Berlin (1835-1913) (Berliner Sternwarte, Berlin Observatory, before 1913)
* 549: Uppsala (Uppsala Astronomical Observatory (UAO); Astronomiska observatoriet i Uppsala)
* 550: Schwerin
* 551: Hurbanovo, formerly O'Gyalla
* 552: Osservatorio S. Vittore, Bologna (Osservatorio San Vittore, Italy)
* 553: Chorzów
* 554: Burgsolms Observatory, Wetzlar
* 555: Cracow-Fort Skała
* 556: Reintal, near Munich
* 557: 奥德热幽夫天文台 (Observatoř Ondřejov, 捷克)
* 558: Warsaw
* 559: Serra La Nave
* 560: Madonna di Dossobuono (Osservatorio Madonna di Dossobuono, Italy)
* 561: Piszkéstető Stn. (Konkoly) (Piszkéstető Station, Konkoly Obszervatórium, Budapest)
* 562: Figl Observatory, Vienna
* 563: Seewalchen
* 564: Herrsching
* 565: Bassano Bresciano (Osservatorio Astronomico di Bassano Bresciano, Italy)
* 566: Haleakala-NEAT/GEODSS
* 567: Chions (Osservatorio di Chions; Chaonis Observatory, Italy)
* 568: Mauna Kea Observatory, Hawaii
* 569: Helsinki
* 570: Vilnius (since 1939)
* 571: Cavriana (Osservatorio "Giordano Bruno", Italy)
* 572: Cologne
* 573: Eldagsen
* 574: Gottolengo
* 575: La Chaux de Fonds
* 576: Burwash
* 577: Metzerlen Observatory
* 578: Linden Observatory
* 579: Novi Ligure
* 580: Graz
* 581: Sedgefield
* 582: Orwell Park
* 583: Odessa-Mayaki
* 584: Leningrad
* 585: Kiev comet station
* 586: Pic du Midi (Observatoire du Pic du Midi, France)
* 587: Sormano (Osservatorio Astronomico Sormano, Italy)
* 588: Eremo di Tizzano
* 589: Osservatorio Astrometrico Santa Lucia Stroncone
* 590: Metzerlen
* 591: Resse Observatory
* 592: Solingen, Germany
* 593: Monte Argentario
* 594: Monte Autore
* 595: Farra d'Isonzo (Osservatorio Astronomico di Farra d'Isonzo, Italy)
* 596: Colleverde di Guidonia (Osservatorio Colleverde di Guidonia, Italy)
* 597: Springe
* 598: Loiano (Osservatorio Astronomico di Loiano, Italy)
* 599: Campo Imperatore-CINEOS (Osservatorio di Campo Imperatore, Italy)
== 600-699 ==
* 600: TLC Observatory, Bologna
* 601: Engelhardt Observatory, Dresden
* 602: Urania Observatory, Vienna
* 603: Bothkamp, near Kiel, Germany (Sternwarte Bothkamp,  Bothkamp Observatory date=20190329105358 )
* 604: Archenhold Sternwarte, Berlin-Treptow
* 605: Marl
* 606: Norderstedt
* 607: Hagen Observatory, Ronkhausen
* 608: Haleakala-AMOS
* 609: Osservatorio Polino
* 610: Pianoro
* 611: Starkenburg Sternwarte, Heppenheim (Starkenburg Observatory)
* 612: Lenkerbeck
* 613: Heisingen
* 614: Soisy-sur-Seine
* 615:  St. Véran
* 616: Brno
* 617: Arbonne-la-Forêt
* 618: Martigues
* 619: Sabadell
* 620: Observatorio Astronómico de Mallorca
* 621: Bergisch Gladbach Observatory
* 622: Oberwichtrach
* 623: Liège
* 624: Dertingen
* 625: Kihei-AMOS Remote Maui Experimental Site
* 626: Geel
* 627: Blauvac
* 628:  Mülheim-Ruhr date=20200223004348
* 629: JATE Observatory, Szeged
* 630: Osenbach
* 631: Hamburg-Georgswerder
* 632: San Polo A Mosciano
* 633: Romito
* 634: Crolles
* 635: Pergignan
* 636:  Essen Observatory aka Walter Hohmann Observatory date=20191204134231 , Germany
* 637: Hamburg-Himmelsmoor
* 638: Detmold
* 639: Dresden
* 640: Senftenberger Sternwarte
* 641: Overberg
* 642: Oak Bay, Victoria
* 643: OCA-Anza Observatory
* 644: Palomar Mountain/NEAT
* 645: Apache Point-Sloan Digital Sky Survey
* 646: Santana Observatory, Rancho Cucamonga
* 647: Stone Finder Observatory, Calgary
* 648: Winer Observatory, Sonoita
* 649: Powell Observatory, Louisburg
* 650: Temecula
* 651: Grasslands Observatory, Tucson
* 652: Rock Finder Observatory, Calgary
* 653: Torus Observatory, Buckley
* 654: Table Mountain Observatory, Wrightwood-PHMC
* 655: Sooke
* 656: Victoria
* 657: Climenhaga Observatory, Victoria
* 658: National Research Council of Canada (Dominion Astrophysical Observatory)
* 659: Heron Cove Observatory, Orcas
* 660: Leuschner Observatory, Berkeley
* 661: Rothney Astrophysical Observatory, Priddis
* 662: Lick Observatory, Mount Hamilton
* 663: Red Mountain Observatory
* 664: Manastash Ridge Observatory
* 665: Wallis Observatory
* 666: Moorpark College Observatory
* 667: Wanapum Dam
* 668: San Emigdio Peak
* 669: Ojai
* 670: Camarillo
* 671: Stony Ridge
* 672: Mount Wilson
* 673: Table Mountain Observatory, Wrightwood
* 674: Ford Observatory, Wrightwood
* 675: Palomar Mountain (Palomar Observatory)
* 676: San Clemente
* 677: Lake Arrowhead
* 678: Fountain Hills (Fountain Hills Observatory, Fountain Hills, AZ)
* 679: San Pedro Martir
* 680: Los Angeles
* 681: Calgary
* 682: Kanab
* 683: Goodricke-Pigott Observatory, Tucson
* 684: Prescott (Prescott Observatory)
* 685: Williams, AZ
* 686: U. of Minn. Infrared Obs., Mt. Lemmon (Mount Lemmon)
* 687: Northern Arizona University, Flagstaff
* 688: Lowell Observatory, Anderson Mesa Station (Anderson Mesa), Flagstaff
* 689: U.S. Naval Observatory, Flagstaff (USNOFS)
* 690: Lowell Observatory, Flagstaff
* 691: Steward Observatory, Kitt Peak-Spacewatch
* 692: Steward Observatory, Tucson
* 693: Catalina Station, Tucson
* 694: Tumamoc Hill, Tucson
* 695: Kitt Peak National Observatory
* 696: Whipple Observatory, Mt. Hopkins (Fred Lawrence Whipple Observatory)
* 697: Kitt Peak, McGraw-Hill
* 698: Mt. Bigelow
* 699: Lowell Observatory-LONEOS (LONEOS)
== 700-799 ==
* 700: Chinle
* 701: Junk Bond Observatory, Sierra Vista, AZ
* 702: Joint Obs. for cometary research, Socorro, NM (now the New Mexico Tech Remote Observatory)
* 703: Catalina Sky Survey, Tucson, AZ
* 704: Lincoln Laboratory ETS, New Mexico (ETS = Experimental Test System)
* 705: Apache Point (Apache Point Observatory, NM)
* 706: Salida, CO
* 707: Chamberlin field station, CO
* 708: Chamberlin Observatory, Denver, CO
* 709: W & B Observatory, Cloudcroft, NM
* 710: MPO Observatory, Florissant, CO
* 711: McDonald Observatory, Fort Davis, TX
* 712: USAF Academy Observatory, Colorado Springs, CO
* 713: Thornton, CO
* 714: Bagdad, AZ
* 715: Jornada Observatory, Las Cruces, NM
* 716: Palmer Divide Observatory, Colorado Springs, CO
* 717: Prude Ranch, TX
* 718: University of Utah, Tooele, UT
* 719: Frank T. Etscorn Campus Observatory, Socorro, NM ( New Mexico Tech Astronomy Club)
* 720: Universidad de Monterrey, Nuevo León, Mexico
* 721: Lime Creek (Lime Creek Observatory, NE)
* 722: Missouri City, TX
* 723: Cottonwood Observatory, Ada, OK
* 724: National Observatory, Tacubaya (Observatorio Astronómico Nacional; Observatorio de Tacubaya, Mexico)
* 725: Fair Oaks Ranch (Fair Oaks Ranch Observatory, Fair Oaks Ranch, Texas)
* 726: Brainerd (Fire in the Sky Observatory, Brainerd, MN)
* 727: Zeno Observatory, Edmond, OK
* 728: Corpus Christi, TX
* 729: Glenlea Astronomical Observatory, Winnipeg, MB
* 730: University of North Dakota, Grand Forks, ND
* 731: Rose-Hulman Observatory, Terre Haute, IN
* 732: Oaxaca, Oaxaca, Mexico
* 733: Allen, Texas
* 734: Farpoint Observatory, Eskridge, KS
* 735: George Observatory, Needville, TX
* 736: Houston, TX
* 737: New Bullpen Observatory, Alpharetta, GA
* 738: Observatory of the State University of Missouri
* 739: Sunflower Observatory, Olathe, KS
* 740: SFA Observatory, Nacogdoches, TX (Stephen F. Austin State University Observatory)
* 741: Goodsell Observatory, Northfield, MN
* 742: Drake University, Des Moines, IA
* 743: University of Minnesota, Minneapolis, MN
* 744: Doyan Rose Observatory, Indianapolis, IN
* 745: Glasgow, Missouri
* 746: Brooks Astronomical Observatory, Mt. Pleasant, MI
* 747: Baton Rouge Observatory, LA
* 748: Van Allen Observatory, Iowa City, IA
* 749: Oakwood, GA
* 750: Hobbs Observatory, Fall Creek, WI
* 751: Lake Saint Louis, MO
* 752: Puckett Observatory, Mountain Town, GA
* 753: Washburn Observatory, Madison, WI
* 754: Yerkes Observatory, Williams Bay, WI
* 755: Optec Observatory, MI
* 756: Dearborn Observatory, Evanston, IL
* 757: High Point, NC
* 758: BCC Observatory, Cocoa, FL (Astronaut Memorial Planetarium & Observatory; BCC = Brevard Community College)
* 759: Nashville, TN
* 760: Goethe Link Observatory, Brooklyn, IN
* 761: Zephyrhills (Quail Hollow Observatory, Zephyrhills, FL)
* 762: Four Winds Observatory, Lake Leelanau, MI
* 763: King City, ON
* 764: Puckett Observatory, Stone Mountain, GA
* 765: Cincinnati, OH
* 766: Michigan State University Observatory, East Lansing, MI
* 767: Angell Hall Observatory, Ann Arbor, MI
* 768: Dearborn, MI
* 769: McMillin Observatory, Columbus, OH
* 770: Crescent Moon Observatory, Columbus, OH
* 771: Boyeros Observatory, Havana, Cuba (Observatorio de Rancho Boyeros)
* 772: Boltwood Observatory, Stittsville, ON
* 773: Warner and Swasey Observatory, Cleveland, OH
* 774: Warner and Swasey Nassau Station, Chardon, OH
* 775: Sayre Observatory, South Bethlehem, PA
* 776: Foggy Bottom, Hamilton (Foggy Bottom Observatory, Hamilton , NY)
* 777: Toronto, ON
* 778: Allegheny Observatory, Pittsburgh, PA
* 779: David Dunlap Observatory, Richmond Hill, ON
* 780: Leander McCormick Observatory, Charlottesville, VA
* 781: Quito, Ecuador
* 782: Quito, comet astrograph station
* 783: Rixeyville, VA
* 784: Stull Observatory, Alfred University, NY
* 785: Fitz-Randolph Observatory, Princeton, NJ
* 786: U.S. Naval Obs., Washington (since 1893)
* 787: U.S. Naval Obs., Washington (before 1893)
* 788: Mount Cuba Observatory, Wilmington, DE
* 789: Litchfield Observatory, Hamilton College,  Clinton, Oneida County, NY
* 790: Dominion Observatory, Ottawa, ON
* 791: Flower and Cook Observatory, Philadelphia, PA
* 792: U. of Rhode Island, Quonochontaug, RI
* 793: Dudley Observatory, Albany (before 1893)
* 794: Vassar College Observatory, Poughkeepsie, NY
* 795: Rutherford, NY
* 796: Stamford, CT
* 797: Yale Observatory, New Haven, CT (Yale University Observatory)
* 798: Yale Observatory, Bethany, CT (Yale University Observatory)
* 799: Winchester, MA
== 800-899 ==
* 800: Harvard Observatory, Arequipa, Peru (Boyden Station)
* 801: Oak Ridge Observatory
* 802: Harvard Observatory, Cambridge, MA (Harvard College Observatory)
* 803: Taunton
* 804: Santiago-San Bernardo
* 805: Santiago-Cerro El Roble
* 806: Santiago-Cerro Calán
* 807: Cerro Tololo Observatory, La Serena (Cerro Tololo Inter-American Observatory)
* 808: El Leoncito (became the Dr. Carlos U. Cesco Observatory (Estación de Altura Carlos Ulrico Cesco) in 1990; seems to be the same as the Observatorio Félix Aguilar, San Juan National University), Argentina
* 809: European Southern Observatory, La Silla (La Silla Observatory)
* 810: Wallace Observatory, Westford (George R. Wallace Jr. Astrophysical Observatory (WAO), Westford, MA)
* 811: Maria Mitchell Observatory, Nantucket
* 812: Viña del Mar
* 813: Santiago-Quinta Normal (1862-1920)
* 814: North Scituate
* 815: Santiago-Santa Lucia (1849-1861)
* 816: Rand Observatory
* 817: Sudbury (Sudbury, Massachusetts)
* 818: Gémeaux Observatory, Laval, QC (Observatoire Gémeaux)
* 819: Val-des-Bois, QC
* 820: Tarija
* 821: Córdoba-Bosque Alegre (Estación Astrofísica de Bosque Alegre, Observatorio Astronómico de Córdoba, Argentina)
* 822: Córdoba (Observatorio Astronómico de Córdoba, Argentina)
* 823: Fitchburg
* 824: Lake Clear
* 825: Granville
* 826: Plessissville, QC
* 827: Saint-Félicien, QC
* 828: Assonet
* 829: Complejo Astronómico El Leoncito (CASLEO)
* 830: Hudson
* 831: Rosemary Hill Observatory, University of Florida
* 832: Etters
* 833: Obs. Astronomico de Mercedes, Buenos Aires
* 834: Buenos Aires-AAAA
* 835: Drum Hill Station, Chelmsford
* 836: Furnace Brook Observatory, Cranston
* 837: Jupiter
* 838: Dayton
* 839: La Plata (La Plata Astronomical Observatory; Observatorio Astronómico de La Plata)
* 840: Flint
* 841: Martin Observatory, Blacksburg
* 842: Gettysburg College Observatory
* 843: Emerald Lane Observatory, Decatur
* 844: Los Molinos
* 845: Clinton B. Ford Observatory , Ithaca
* 846: Principia Astronomical Observatory, Elsah
* 847: Lunar Cafe Observatory
* 848: Tenagra Observatory, Cottage Grove
* 849: Everstar Observatory, Olathe, KS (EverStaR Observatory)
* 850: Cordell-Lorenz Observatory, Sewanee
* 851: Burke-Gaffney Observatory, Halifax
* 852: River Moss Observatory, St. Peters
* 853: Biosphere 2 Observatory
* 854: Sabino Canyon Observatory, Tucson
* 855: Wayside Observatory, Minnetonka
* 856: Riverside
* 857: Iowa Robotic Observatory, Sonoita
* 858: Tebbutt Observatory, Edgewood
* 859: Wykrota Observatory-CEAMIG (Observatório Wykrota - CEAMIG (Centro de Estudos Astronômicos de Minas Gerais))
* 860: Valinhos
* 861: Barão Geraldo
* 862: Saku
* 863: Furukawa
* 864: Kumamoto (KCAO (Kumamoto Civil Astronomical Observatory), Kumamoto, Kumamoto, Japan)
* 865: Emmy Observatory, New Paltz
* 866: U.S. Naval Academy, Michelson
* 867: Saji Observatory
* 868: Hidaka Observatory
* 869: Tosa
* 870: Campiñas (Observatório de Campinas, a.k.a. Observatório Municipal de Campinas "Jean Nicolini")
* 871: Akou
* 872: Tokushima
* 873: Kurashiki Observatory
* 874: Itajuba
* 875: Yorii
* 876: Honjo
* 877: Okutama
* 878: Kagiya
* 879: Tōkai (Tōkai, Aichi, Japan)
* 880: Rio de Janeiro
* 881: Toyota
* 882: JCPM Oi Station
* 883: Shizuoka (Shizuoka, Shizuoka, Japan)
* 884: Kawane
* 885: JCPM Yakiimo Station
* 886: Mishima (Mishima, Shizuoka, a.k.a. Susono, Shizuoka, Japan)
* 887: Ojima (Ojima, Gunma, Japan)
* 888: Gekko Observatory
* 889: Karasuyama (Karasuyama, Tochigi, Japan)
* 890: JCPM Tone Station
* 891: JCPM Kimachi Station
* 892: YGCO Hoshikawa and Nagano Stations
* 893: Sendai Municipal Observatory (Sendai Astronomical Observatory)
* 894: Kiyosato
* 895: Hatamae
* 896: Yatsugatake South Base Observatory (near 386 Yatsugatake-Kobuchizawa)
* 897: YGCO Chiyoda Station (YGCO: Yamaneko Group of Comet Observers)
* 898: Fujieda (Fujieda, Shizuoka, Japan)
* 899: Toma
== 900-999 ==
* 900: Moriyama (Moriyama, Shiga, Japan)
* 901: Tajimi
* 902: Ootake
* 903: Fukuchiyama and Kannabe (Fukuchiyama and Kannabe Observatory, Japan)
* 904: Go-Chome and Kobe-Suma
* 905: Nachi-Katsuura Observatory
* 906: Cobram
* 907: Melbourne
* 908: Toyama
* 909: Snohomish Hilltop Observatory
* 910: Caussols-ODAS
* 911: Collins Observatory, Corning Community College
* 912: Carbuncle Hill Observatory, Greene
* 913: Observatorio Kappa Crucis, Montevideo
* 914: Underwood Observatory, Hubbardston
* 915: River Oaks Observatory, New Braunfels
* 916: Oakley Observatory, Terre Haute
* 917: Pacific Lutheran University Keck Observatory
* 918: Badlands Observatory, Quinn
* 919: Desert Beaver Observatory
* 920: RIT Observatory, Rochester, NY (RIT = Rochester Institute of Technology)
* 921: SW Institute for Space Research, Cloudcroft
* 922: Timberland Observatory, Decatur
* 923: The Bradstreet Observatory, St. Davids
* 924: Observatoire du Cégep de Trois-Rivières
* 925: Palominas Observatory
* 926: Tenagra II Observatory
* 927: Madison-YRS
* 928: Moonedge Observatory, Northport
* 929: Port Allen
* 930: Tahiti
* 931: Punaauia
* 932: John J. McCarthy Obs., New Milford
* 933: Rockland Observatory, Sierra Vista
* 934: Poway Valley
* 935: Wyrick Observatory, Haymarket
* 936: Ibis Observatory, Manhaatan
* 937: Bradbury Observatory, Stockton-on-Tees
* 938: Linhaceira
* 939: Observatorio Rodeno
* 940: Waterlooville
* 941: Observatorio Pla D'Arguines
* 942: Grantham
* 943: Peverell
* 944: Observatorio Geminis, Dos Hermanas
* 945: Observatorio Monte Deva
* 946: Ametlla de Mar Observatory
* 947: Saint-Sulpice
* 948: Pymoor
* 949: Durtal
* 950: Roque de los Muchachos Observatory, La Palma
* 951: Highworth
* 952: Marxuquera
* 953: Montjoia
* 954: Teide Observatory (Observatorio del Teide)
* 955: Sassoeiros
* 956: Observatorio Pozuelo
* 957: Merignac
* 958:  Observatoire de Dax date=20170616221027
* 959: Ramonville Saint Agne
* 960: Rolvenden
* 961: City Observatory, Edinburgh
* 962: Gandia
* 963: Werrington
* 964: Southend Bradfield
* 965: Observação Astronómica no Algarve, Portimão (COAA: Centro de Observação Astronómica no Algarve)
* 966: Church Stretton
* 967: Greens Norton
* 968: Haverhill
* 969: London-Regents Park (George Bishop's Observatory, Regent's Park, 1836-1861)
* 970: Chelmsford
* 971: Lisbon
* 972: Dun Echt
* 973: Harrow
* 974: Genoa
* 975: Valencia
* 976: Leamington Spa
* 977: Markree (Markree Observatory, County Sligo, Ireland)
* 978: Conder Brow
* 979: South Wonston
* 980: Lancaster
* 981: Armagh
* 982: Dunsink Observatory, Dublin
* 983: San Fernando
* 984: Eastfield
* 985: Telford
* 986: Ascot
* 987: The Isle of Man Observatory
* 988: Glasgow
* 989: Wilfred Hall Observatory, Preston
* 990: Madrid, Spain (Observatorio Astronómico de Madrid)
* 991: Liverpool (since 1867)
* 992: Liverpool (before 1867)
* 993: Woolston Observatory
* 994: Godalming
* 995: Durham (Durham University Observatory)
* 996: Oxford (Radcliffe Observatory)
* 997: Hartwell
* 998: London-Mill Hill (University of London Observatory)
* 999: Bordeaux-Floirac (Observatoire de Bordeaux)
== A00-A99 ==
* A00: Gravesend, U.K.
* A01: Masia Cal Maciarol Modul 2
* A02: Masia Cal Maciarol Modul 8
* A03: Torredembarra
* A04: Saint-Caprais
* A05: Belesta
* A06: Mataró
* A07: Gretz-Armainvilliers
* A08: Malibert
* A09: Quincampoix
* A10:  Observatorio Astronómico de Conbera
* A11: Wormhout
* A12: Stazione Astronomica di Sozzago
* A13: Observatoire Naef, Marly, Switzerland (Observatory Naef Ependes)
* A14: Les Engarouines Observatory
* A15: Josef Bresser Sternwarte, Borken
* A16: Tentlingen
* A17: Guidestar Observatory, Weinheim
* A18: Herne
* A19: Köln
* A20: Sögel
* A21: Irmtraut
* A22: Starkenburg Sternwarte-SOHAS
* A23: Sternwarte Weinheim, Germany
* A24: New Millennium Observatory, Mozzate
* A25: Nova Milanese
* A26: Darmstadt
* A27: Eridanus Observatory, Langelsheim
* A28: Kempten
* A29: Santa Maria a Monte
* A30: Crespadoro
* A31: Corcaroli Observatory
* A32: Panker
* A33: Volkssternwarte Kirchheim
* A34: Grosshabersdorf
* A35: Hormersdorf Observatory
* A36: Ganda di Aviatico
* A37: Mueggelheim
* A38: Campocatino Automated Telescope, Collepardo
* A39: Altenburg
* A40: Pieta
* A41: Rezman Observatory, Kamnik
* A42: Gehrden
* A43:  Inastars Observatory date=20090206135241 , Potsdam
* A44: Altschwendt
* A45: Karrenkneul
* A46: Lelekovice
* A47: Matera
* A48: Povegliano Veronese
* A49: Uppsala University-Ångström laboratory
* A50: 安德鲁绍夫卡天文台（Андрушівська астрономічна обсерваторія），乌克兰日托米尔州安德鲁绍夫卡
* A51: Danzig
* A52: Etyek
* A53: Peschiera del Garda
* A54: Ostrorog
* A55: Osservatorio Astronomico Vallemare di Borbona, Italy
* A56: Parma
* A57: Osservatorio Astron. Margherita Hack, Firenze
* A58: Observatoire de Chalandray-Canotiers
* A59: Karlovy Vary Observatory
* A60: YSTAR-NEOPAT Station, Sutherland
* A61: Tortona
* A62: Aichtal
* A63: Cosmosoz Obs., Tassin la Demi Lune
* A64: Couvaloup de St-Cergue
* A65: Le Couvent de Lentin
* A66: Stazione Osservativa Astronomica, Livorno
* A67: Chiusa di Pesio
* A68: Swedenborg Obs., Bockholmwik
* A69: Osservatorio Palazzo Bindi Sergardi
* A70: Lumijoki
* A71: Stixendorf
* A72: Radebeul Observatory (Sternwarte "Adolph Diesterweg" Radebeul, Germany)
* A73: Penzing Astrometric Obs., Vienna
* A74: Bergen-Enkheim Observatory, Germany
* A75: Fort Pius Observatory, Barcelona
* A76: Andromeda Observatory, Miskolc
* A77: Observatoire Chante-Perdrix, Dauban, Haute-Provence, France
* A78: Stia
* A79:  Zvezdno Obshtestvo Observatory date=20170709032350 , Plana
* A80: Lindenberg Observatory
* A81: Balzaretto Observatory, Rome
* A82: Osservatorio Astronomico di Trieste
* A83: Jakokoski Observatory
* A84: TUBITAK National Observatory
* A85: Odessa Astronomical Observatory, Kryzhanovka, Ukraine
* A86: Albigneux
* A87: Rimbach
* A88: Bolzaneto
* A89: Sterni Observatory, Kempten
* A90: Sant Gervasi Observatory, Barcelona
* A91: Hankasalmi Observatory, Hankasalmi, Finland
* A92: Urseanu Observatory, Bucharest
* A93: Lucca
* A94: Cormons, ITALY
* A95: Taurus Hill Observatory, Varkaus
* A96: Klosterneuburg
* A97: Stammersdorf
* A98: Taurus-1 Observatory, Baran'
* A99: Osservatorio del Monte Baldo
== B00-B99 ==
* B00: Savigny-le-Temple
* B01:  Taunus Observatory, Frankfurt
* B02: Kielce
* B03: Alter Satzberg, Vienna
* B04: Saint-Barthelemy Observatory
* B05:  Ka-Dar Observatory date=20210211053705 , Barybino, Moscow region
* B06:  Montseny Astronomical Observatory date=20161112235754 , Spain
* B07: Camorino
* B08: San Lazzaro di Savena
* B09: Capannoli, Italy  Pietro Dora Vivarelli ASA
* B10: Observatoire du Mas des Gres, Moydans
* B11: Osservatorio Cima Rest, Imola
* B12: The  Koschny Observatory date=20080609221632 , Noordwijkerhout
* B13: Osservatorio di Tradate
* B14: Ca del Monte
* B15:  Inastars Observatory date=20200527014019 , Potsdam (since 2006)
* B16: 1st Moscow Gymnasium Observatory, Lipki
* B17: AZT-8 Evpatoria
* B18: Terskol
* B19: Observatori Iluro, Mataró
* B20: Observatori Carmelita, Tiana
* B21: Gaisberg Observatory (Sternwarte Gaisberg), Schaerding (Schärding, Austria)
* B22: Observatori d'Ager, Barcelona
* B23:  Fiamene, Italy
* B24: Cesson
* B25: Catania
* B26: Observatoire des Terres Blanches, Reillanne
* B27: Picard Observatory, St. Veit
* B28: Mandi Observatory, Pagnacco, Italy
* B29: L'Ampolla Observatory, Tarragona
* B30: Szamotuly-Galowo, Poland
* B31: 南非大望远镜 (SALT)， (位于南非北开普省索色兰)
* B32:  Observatory Gelenau(Germany)
* B33: Libbiano Observatory, Peccioli -  AAAV
* B34: Green Island Observatory, Gecitkale
* B35: Bareket observatory, Macabim, Israel.
* B36: Redshed Observatory, Kallham
* B37: Obs. de L' Ametlla del Valles, Barcelona
* B38: Santa Mama
* B39: Tradate
* B40: Skylive Observatory, Catania, Italy ( Gruppo Astrofili Catanesi)
* B41: Zlin Observatory
* B42: Vitebsk
* B43: Hennef
* B44: Eygalayes, France
* B45: Narama
* B46: Sintini Observatory, Argenta
* B47: Metsala Observatory, Espoo
* B48: Bocholt
* B49: Paus Observatory, Sabadell
* B50: Corner Observatory, Durmersheim
* B51: Vallauris
* B52: Observatorio El Far
* B53: Casal Lumbroso, Rome
* B54: Ager
* B55: Comeglians
* B56: Observatorio Sant Pere, Mataró
* B57: Laietania Observatory, Parets del Vallès
* B58: Polaris Observatory, Budapest
* B59: Borken
* B60: Deep Sky Observatorium, Bad Bentheim
* B61: Valldoreix Obs.,Sant Cugat del Valles
* B62: Brelingen
* B63: Solaris Observatory, Luczanowice
* B64: Slope Rock Observatory, Hyvinkaa
* B65: Komakallio Observatory, Kirkkonummi
* B66: Osservatorio di Casasco
* B67: Sternwarte Mirasteilas, Falera, Switzerland
* B68: Mount Matajur Observatory
* B69:  Owls and Ravens Observatory date=20210125202612 , Holzgerlingen
* B70: Sant Celoni
* B71: Observatorio El Vendrell
* B72: Soerth
* B73:  Mauren Valley Observatory, Holzgerlingen date=20210125202612
* B74:  Santa María de Montmagastrell date=20170822190245
* B75: Stazione Astronomica Betelgeuse, Magnago
* B76: Sternwarte Schönfeld, Dresden
* B77:  Schafmatt Observatory, Aarau date=20110430010650
* B78: Astrophoton Observatory, Audorf
* B79: Marana Observatory
* B80: Osservatorio Astronomico Campomaggiore
* B81: Caimari
* B82:  Maidbronn
* B83: Gières
* B84: Cyclops Observatory, Oostkapelle
* B85: Beilen Observatory
* B86:  Sternwarte Hagen date=20201127204725 , Germany
* B87: Banyoles
* B88: Bigmuskie Observatory, Mombercelli
* B89: Observatori Astronòmic de Tiana
* B90: Malina River Observatory, Povoletto
* B91: Bollwiller
* B92: Chinon
* B93: Hoogeveen
* B94:  Petrozavodsk date=20210211005156
* B95: Achternholt
* B96:  Brixiis Observatory, Kruibeke
* B97: Sterrenwacht Andromeda, Meppel
* B98: Siena
* B99: Santa Coloma de Gramenet
== C00-C99 ==
* C00: Velikie Luki
* C01: Lohrmann-Observatorium, Triebenberg
* C02: Observatorio Royal Park
* C03: Clayhole Observatory, Jokela, Finland
* C04: Kramatorsk, Ukraine
* C05: Königsleiten, Austria
* C06: Siberian State Aerospace University  Observatory date=20201127032652 , Krasnoyarsk, Russia
* C07:  Anysllum Observatory date=20210125150704 , Ager, Spain
* C08: Fiby, Sweden
* C09: Rouet, France
* C10:  Maisoncelles, France
* C11: City Observatory, Slaný, Czech Republic
* C12: Berta Observatory, Sabadell, Spain
* C13: Como, Italy
* C14: Sky Vistas Observatory, Eichgraben, Austria
* C15:  ISON-Ussuriysk date=20201105041130 , Russia
* C16: Isarwinkel Observatory, Bad Tölz, Germany
* C17:  Observatorio Joan Roget, Ager, Spain
* C18: Frasnes-Lez-Anvaing, Belgium
* C19: ROSA Observatory, Vaucluse, France
* C20: Kislovodsk Mtn. Astronomical Stn., Pulkovo Obs., Russia
* C21: Observatorio Via Lactea, Ager, Spain
* C22: Oberwiesenthal, Germany
* C23: Olmen, Belgium
* C24: Seveso, Italy
* C25: Pulkovo Observatory Station, Campo Imperatore, Italy
* C26: Levendaal Observatory, Leiden, Netherlands
* C27: Pallerols, Spain
* C28: Wellinghofen, Germany
* C29: Observatori Astronómic de Les Planes de Son, Spain
* C30: Petrozavodsk University Obs., Sheltozero Stn., Russia
* C31: Sternwarte Neanderhoehe Hochdahl e.V., Erkrath, Germany
* C32: Ka-Dar Observatory,  TAU Station date=20201031223902 , Nizhny Arkhyz, Russia
* C33: Observatorio CEAM, Caimari, Canary Islands, Spain
* C34: Baja Astronomical Observatory, Hungary
* C35: Terrassa, Spain
* C36: Starry Wanderer Observatory, Baran', Belarus
* C37: Stowupland, England, Great Britain
* C38: Varuna Observatory, Cuorgnè, Italy
* C39: Nijmegen, Netherlands
* C40: Kuban State University Astrophysical Observatory, Russia
* C41: MASTER-II Observatory, Kislovodsk, Russia
* C42: Xingming Observatory, Mt. Nanshan, China
* C43: Hoyerswerda, Germany
* C44: A. Volta Observatory, Lanzo d'Intelvi, Italy
* C45: MPC1 Cassia Observatory, La Giustiniana, Italy
* C46: Horizon Observatory, Petropavlovsk, Kazakhstan
* C47:  Nonndorf date=20210223132155 , Austria
* C48: Sayan Solar Observatory, Irkutsk, Russia
* C49: STEREO-A
* C50: STEREO-B
* C51: WISE
* C60: Argelander Institute for Astronomy Obs., Bonn, Germany
* C61: Chelles, France
== D00-D99 ==
* D14: Nanchuan Observatory, Guangzhou
* D16: Po Leung Kuk Observatory, Tuen Mun
* D17: Hong Kong
* D18: Mt. Guizi Observatory, China
* D20: Zadko Observatory, Wallingup Plain
* D21: Shenton Park
* D22: UWA Observatory, Crawley, WA, Australia
* D24: LightBuckets Observatory, Pingelly
* D25:  Tzec Maun Observatory date=20210126183206 , Pingelly, WA, Australia
* D29: 紫金山天文台盱眙观测站
* D32: JiangNanTianChi Observatory, Mt. Getianling
* D34: 垦丁天文台
* D35: 鹿林天文台
* D36: Tataka, Mt. Yu-Shan National Park
* D39: Shandong University Observatory, Weihai
* D44: Ishigakijima Astronomical Observatory
* D55: Kangwon Science High School Observatory, Ksho
* D57: Gimhae Astronomical Observatory, Uhbang-dong
* D58: KSA SEM Observatory, Danggam-dong
* D61: Suntopia Marina, Sumoto
* D62: Miyaki-Argenteus
* D70: Tosa
* D74: Nakagawa (Anan Science Center Nakagawa Observatory, formerly Nakagawa Science Center Nakagawa Observatory, Japan)
* D78: Iga-Ueno
* D79: YSVP Observatory, Vale Park, SA, Australia
* D80: Gumma Astronomical Observatory
* D81: Nagano
* D82: Wallaroo
* D83: Miwa
* D84: Hallet Cove
* D85: Ingle Farm
* D86: Penwortham
* D87: Brooklyn Park
* D88: Hiratsuka
* D89: Yamagata (Yamagata Astronomical Observatory)
* D90: RAS Observatory, Moorook, SA, Australia
* D91: Adati
* D92: Osaki, Japan
* D93: Sendai Astronomical Observatory, Japan
* D94: Takanezawa, Tochigi, Japan
* D95: Kurihara
* D96:  Tzec Maun Observatory date=20210126183206 , Moorook, SA, Australia
* D97: Berri, SA, Australia'
== E00-E99 ==
* E00: Castlemaine
* E01: South Yarra (Barfold)
* E03: RAS Observatory, Officer
* E04: Pacific Sky Observatory, Saipan
* E05: Earl Hill Observatory, Trinity Beach
* E07: Murrumbateman, NSW, Australia
* E08: Wobblesock Observatory, Coonabarabran
* E09: Oakley Southern Sky Observatory, Coonabarabran
* E10: Siding Spring-Faulkes Telescope South
* E11: Frog Rock Observatory, Mudgee
* E12: Siding Spring Survey
* E13: Wanniassa
* E14: Hunters Hill Observatory, Ngunnawal
* E15: Magellan Observatory, near Goulburn
* E16: Grove Creek Observatory, Trunkey
* E17: Leura
* E18: BDI Observatory, Bangor, (Near Sutherland South of Sydney)
* E19: Kingsgrove
* E20: Marsfield
* E21: Norma Rose Observatory, Leyburn, Queensland, Australia
* E22: Univ. of Southern Queensland Obs., Mt. Kent
* E23: Arcadia, Australia
* E24: Tangra Observatory, St. Clair, NSW, Australia
* E25: Rochedale (APTA)
* E26: RAS Observatory, Biggera Waters
* E27: Thornlands
* E28: Kuriwa Observatory, Hawkesbury Heights, NSW, Australia
* E81: Nelson, New Zealand
== F00-F99 ==
* F51: 泛星计划 1, Haleakala
* F59: Ironwood Remote Observatory, Hawaii
* F60: Ironwood North Observatory, Hawaii
* F65: Haleakala-Faulkes Telescope North (Haleakala Observatory)
* F84: Hibiscus Observatory, Punaauia
* F85: Tiki Observatory, Punaauia
* F86: Moana Observatory, Punaauia
== G00-G99 ==
* G51: Byrne Observatory, Sedgwick Reserve, CA, U.S.A.
* G52: Stone Edge Observatory, El Verano, CA, U.S.A.
* G53: Alder Springs Observatory, Auberry, CA, U.S.A.
* G54: Hemet, CA, U.S.A.
* G55: Bakersfield, CA, U.S.A.
* G56: Walnut Creek
* G57: Dilbert Observatory, Forest Grove
* G58: Chabot Space and Science Center, Oakland
* G59: Maiden Lane Obs., Bainbridge Island
* G60: Carroll Observatory, Montecito
* G61: Pleasanton
* G62: Sunriver Nature Center Observatory, Sunriver
* G63: Mill Creek Observatory, The Dalles
* G64: Blue Canyon Observatory
* G65: Vulcan North, Lick Observatory, Mount Hamilton
* G66: Lake Forest Observatory, Forest Hills
* G67: Rancho del Sol, Camino
* G68: Sierra Stars Observatory, Markleeville
* G69: Thousand Oaks
* G70: Francisquito Observatory, Los Angeles, CA, U.S.A.
* G71: Rancho Palos Verdes
* G72: University Hills
* G73: Mount Wilson-TIE
* G74: Boulder Knolls Observatory, Escondido, CA, U.S.A.
* G75: Starry Knight Observatory, Coto de Caza
* G76: Altimira Observatory, Coto de Caza
* G77: Baldwin Lake
* G78: Desert Wanderer Observatory, El Centro
* G79: Goat Mountain Astronomical Research Station
* G80: Sierra Remote Observatories, Auberry
* G81: Temecula
* G82: SARA Observatory, Kitt Peak
* G83: Mt. Graham-LBT
* G84: Mount Lemmon SkyCenter
* G85: Vermillion Cliffs Observatory, Kanab
* G86: Tucson-Winterhaven
* G87: Calvin M. Hooper Memorial Observatory, Hyde Park
* G88: LAMP Observatory, New River
* G89: Kachina Observatory, Flagstaff
* G90: Three Buttes Observatory, Tucson
* G91: Whipple Observatory, Mt. Hopkins—2MASS(Fred Lawrence Whipple Observatory)
* G92:  Jarnac Observatory, Vail
* G93: Sonoita Research Observatory, Sonoita, Arizona
* G94: Sonoran Skies Observatory, St. David
* G95: Hereford Arizona Observatory, Hereford
* G96: Mt. Lemmon Survey (Mount Lemmon)
* G97: Astronomical League Alpha Observatory, Portal
* G98: Calvin-Rehoboth Observatory, Rehoboth (Calvin-Rehoboth Robotic Observatory)
* G99: NF Observatory, Silver City
== H00-H99 ==
* H00: Tyrone
* H01: Magdalena Ridge Observatory, New Mexico Tech
* H02: Sulphur Flats Observatory, La Cueva
* H03: Sandia View Observatory, Rio Rancho, NM
* H04: Santa Fe
* H05: Edmund Kline Observatory, Deer Trail
* H06: RAS Observatory, Mayhill, NM (RAS (Remote Astronomical Society) Observatory of New Mexico; a.k.a. New Mexico Skies Observatory)
* H07: 7300 Observatory, Cloudcroft, NM
* H08: BlackBird Observatory, Cloudcroft, NM
* H09: Antelope Hills Observatory, Bennett
* H10: Tzec Maun Foundation Observatory, Mayhill, NM
* H11:  LightBuckets Observatory, Rodeo, NM, U.S.A.
* H12:  TechDome date=20201105041159 , Mayhill, NM, U.S.A.
* H13:  Lenomiya Observatory, Casa Grande, AZ, U.S.A.
* H14:  Morning Star Observatory date=20211119021001 , Tucson, AZ, U.S.A.
* H15:  ISON-NM date=20210303094941 ，Mayhill，美国，新墨西哥州
* H16: HUT Observatory, Eagle, CO, U.S.A.
* H17: Angel Peaks Observatory, CO, U.S.A.
* H18: Vail, AZ, U.S.A.
* H19: Lone Star Observatory, Caney, OK, U.S.A.
* H20: Eastern Illinois University Obs., Charleston, IL, U.S.A.
* H21: Astronomical Research Observatory, Westfield, IL, U.S.A.
* H22: Terre Haute
* H23: Pear Tree Observatory, Valparaiso
* H24: J. C. Veen Observatory, Lowell
* H25: Harvest Moon Observatory, Northfield
* H26: Doc Greiner Research Observatory, Janesvillle
* H27: Moonglow Observatory, Warrensburg
* H28: Preston Hills Observatory, Celina
* H29: Ivywood Observatory, Edmond
* H30: University of Oklahoma Observatory, Norman
* H31: Star Ridge Observatory, Weimar
* H32: Texas A&M Physics Observatory, College Station
* H33: Bixhoma Observatory, Bixby
* H34: Chapel Hill
* H35: Leavenworth
* H36: Sandlot Observatory, Scranton, KS
* H37: Grems Timmons Observatories, Graettinger
* H38: Timberline Observatory, Urbandale
* H39: S.O.S. Observatory, Minneapolis
* H40: Nubbin Ridge Observatory
* H41: Petit Jean Mountain, AR
* H42: Wartburg College Observatory, Waverly
* H43: Conway
* H44: Cascade Mountain
* H45: Petit Jean Mountain South, AR
* H46: Ricky Observatory, Blue Springs, Missouri.
* H47: Vicksburg, MS
* H48: PSU Greenbush Observatory, Pittsburg
* H49: ATU Astronomical Observatory, Russellville
* H50: University of Central Arkansas Obs., Conway
* H51: Greiner Research Observatory, Verona, WI
* H52: Hawkeye Observatory, Durand
* H53: Thompsonville
* H54: Cedar Drive Observatory, Pulaski
* H55: Astronomical Research Observatory, Charleston, IL (Antares Observatory, Charleston, IL)
* H56: Northbrook Meadow Observatory
* H57: Ohio State University Observatory, Lima
* H58: NASA/MSFC ALaMO, Redstone Arsenal
* H59: Prairie Grass Observatory, Camp Cullom
* H60: Heartland Observatory, Carmel, IN, U.S.A.
* H61: Newcastle
* H62: Calvin College Observatory
* H63: DeKalb Observatory, Auburn
* H64: Thomas More College Observatory, Crestview Hills
* H65: Waltonfields Observatory, Walton
* H66: Yellow Springs
* H67: Stonegate Observatory, Ann Arbor, MI
* H68: Red Barn Observatory, Ty Ty, GA
* H69: Ohio Wesleyan University
* H70: Asheville
* H71: Chula
* H72: Evelyn L. Egan Observatory, Fort Myers, Florida
* H73: Lakeland Astronomical Observatory, Kirtland
* H74: Bar J Observatory, New Smyrna Beach
* H75: Indian Hill North Observatory, Huntsburg
* H76: Oakridge Observatory, Miami
* H77: Buehler Observatory
* H78: University of Nariño Observatory, Pasto
* H79: York University Observatory, Toronto
* H80: Halstead Observatory, Princeton
* H81: Hartung-Boothroyd Observatory, Ithaca, New York, USA
* H82: CBA-NOVAC Observatory, Front Royal, Virginia, USA
* H83: Timberlake Observatory, Oakton
* H84: Northview Observatory, Mendon
* H85: Silver Spring, MD
* H86: CBA-East Observatory, Laurel
* H87: Fenwick Observatory, Richmond
* H88: Hope Observatory, Belcamp
* H89: Galaxy Blues Observatory, Gatineau, QC
* H90: Ottawa
* H91: Reynolds Observatory, Potsdam
* H92: Arcturus Observatory
* H93: Berkeley Heights
* H94: Cedar Knolls
* H95: NJIT Observatory, Newark
* H96:  Observatoire des Pléïades, Mandeville
* H97: Talcott Mountain Science Center, Avon
* H98: Dark Roseanne Obs., Middlefield, CT
* H99: Sunhill Observatory, Newton
== I00-I99 ==
* I00: Carbuncle Hill Observatory, Coventry
* I01: Clay Center Observatory, Brookline
* I02: Cerro Tololo Observatory, La Serena—2MASS (Cerro Tololo Inter-American Observatory)
* I03: European Southern Obs., La Silla—ASTROVIRTEL (La Silla Observatory)
* I04: Mamalluca Observatory
* I05: Las Campanas Observatory-TIE
* I06: Werner Schmidt Obs., Dennis-Yarmouth Regional HS
* I07: Conlin Hill Observatory, Oxford
* I08: Alianza S4, Cerro Burek
* I09:  Cerro Armazones, Chile
* I10: CAOS-CampoCatino Austral Observatory Survey (Campo Catino Austral Observatory Survey, Chile )
* I11: Gemini South Observatory, Cerro Pachón
* I12: Phillips Academy Observatory, Andover
* I13: Burleith Observatory, Washington D.C., U.S.A.
* I14: Tigh Speuran Observatory, Framingham
* I15: Wishing Star Observatory, Barrington
* I16: IAA-AI Atacama, San Pedro de Atacama, Chile
* I17:  Thomas G. Cupillari Observatory date=20051118174849 , Fleetville, PA, U.S.A.
* I18: Fan Mountain Observatory, Covesville, VA, U.S.A.
* I19: Observatorio El Gato Gris, Tanti, Argentina
* I20:  Rio Cuarto, Argentina
* I21: El Condor Observatory, Córdoba
* I22: Abbey Ridge Observatory, Stillwater Lake
* I23: Frosty Cold Observatory, Mash Harbor, ME, U.S.A.
* I24:  Lake of the Woods Observatory date=20201127012605 , Locust Grove, VA, U.S.A.
* I25: ECCCO Observatory, Bosque Alegre, Argentina
* I26: Observatorio Kappa Crucis, Córdoba, Argentina
* I27: Barred Owl Observatory, Carp, Canada
* I28: Starhoo Observatory, Lakeville, MA, U.S.A.
* I29: Middlesex School Observatory, Concord, MA, U.S.A.
* I30: Observatorio Geminis Austral
* I31: Observatorio Astronomico del Colegio Cristo Rey
* I32: Observatorio Beta Orionis, Rosario
* I33: SOAR, Cerro Pachón, Chile
* I34: Morgantown, PA, U.S.A.
* I35: Sidoli, Argentina
* I36: Observatorio Los Campitos, Cañuela, Argentina
* I37: Astrodomi Observatory, Santa Rita  date=20200612213741
* I38: Observatorio Los Algarrobos, Salto
* I39: Observatorio Cruz del Sur, San Justo, Argentina
* I40: La Silla-- TRAPPIST date=20110706132248 , Chile
* I41: Palomar Mountain--PTF, CA, U.S.A.
* I42: OWC Observatory, Niceville, FL, U.S.A.
* I43: Tarleton State University Obs., Stephenville, TX, U.S.A.
* I66: Taurus Australis Observatory, Brasília, Brazil
* I68: Pousada dos Anoes Observatory
* I77: CEAMIG-REA Observatory, Belo Horizonte, Brazil
* I82: Güímar, Canary Islands, Spain
* I83: Cherryvalley Observatory, Rathmolyon, Ireland
* I84: Cerro del Viento, Badajoz, Spain
* I85: Las Negras, Spain
* I86: Observatorio UCM, Madrid, Spain
* I87: Astroshot Observatory, Monasterevin, Ireland
* I88:  Fuensanta de Martos, Spain
* I89: Nerpio, Spain
* I90: Blackrock Castle Observatory, Ireland
* I91: Retamar, Spain
* I92: Astreo Observatory, Mairena del Aljarafe, Spain
* I93: St Pardon de Conques, France
* I94: Observatorio Rho Ophiocus, Las Rozas de Madrid, Spain
* I95: Observatorio de la Hita, Spain
* I96:  Hyperion Observatory date=20201105041236 , Urbanizacion Caraquiz, Spain
* I97: Penn Heights Observatory, Rickmansworth, U.K.
* I98: El Berrueco, Spain
* I99:  Observatorio Blanquita date=20200612213755 , Vaciamadrid, Spain
== J00-J99 ==
* J00: Segorbe, Spain
* J01: Observatorio Cielo Profundo, Oviedo, Spain
* J02: Busot, Spain
* J03: Gothers Observatory, St. Dennis
* J04: ESA Optical Ground Station, Tenerife
* J05: Bootes Observatory, Boecillo
* J06: Trent Astronomical Observatory, Clifton
* J07: Observatorio SPAG Monfragüe, Palazuelo-Empalme
* J08: Observatorio Zonalunar, Puzol
* J09: Balbriggan
* J10: Alicante
* J11: Matosinhos
* J12: Caraquiz
* J13: La Palma-Liverpool Telescope
* J14: La Corte
* J15: Muxagata
* J16: An Carraig Observatory, Northern Ireland  An Carraig Observatory
* J17: Ragdon
* J18: Dingle Observatory, Montgomery, Wales, U.K.
* J19: El Maestrat
* J20: Aravaca
* J21: El Boalo
* J22: Tacande Observatory, La Palma
* J23: Centre Astronomique de La Couyere
* J24: Observatorio Altamira
* J25: Penamayor Observatory, Nava
* J26: The Spaceguard Centre, Knighton
* J27:  El Guijo Observatory date=20201105041240 , Spain
* J28:  Observatorio Jaén, Jaén, Spain
* J29: Observatorio Nira, Tias
* J30: Observatorio Ventilla, Madrid
* J31: La Axarquia
* J32: Aljaraque
* J33: University of Hertfordshire Obs., Bayfordbury
* J34: La Fecha
* J35: Tucci Observatory, Martos
* J36:  Observatorio DiezALaOnce, Illana
* J37: Huelva
* J38:  Observatorio La Vara date=20201124212739 , Valdés
* J39: Ingenio
* J40:  Observatorio Malaga Malaga
* J41: Raheny
* J42: Puzol
* J43: Oukaïmeden Observatory
* J44: Observatorio Iturrieta, Alava
* J45:  Observatorio Montana Cabreja Vega de San Mateo, Gran Canaria.
* J46: Observatorio Montana Blanca, Tias
* J47: Observatorio Nazaret
* J48: Observatory Mackay, La Laguna
* J49: Santa Pola
* J50: La Palma-NEON
* J51:  Observatorio Atlante date=20071217103630 , Tenerife
* J52: Observatorio Pinsoro
* J53: Posadas
* J54: Bradford Robotic Telescope
* J55: Los Altos de Arguineguin Observatory
* J56: Observatorio La Avejerilla
* J57: Centro Astronómico Alto Turia, Valencia
* J58: Brynllefrith Observatory, Llantwit Fardre, Wales, UK
* J59: Observatorio Linceo, Santander
* J60: Tocororo Observatory, Arquillinos
* J61: Brownstown Observatory, Kilcloon
* J62: Kingsland Observatory, Boyle
* J63: San Gabriel
* J64: La Mata
* J65: Celbridge
* J66: Kinver
* J67: Observatorio La Puebla de Vallbona
* J68: Tweenhills Observatory, Hartpury, Gloucestershire, England, UK
* J69: North Observatory, Clanfield, UK
* J70:  Obs. Astronómico Vega del Thader, El Palmar
* J71: Willow Bank Observatory, Lancashire, England, UK
* J72: Valle del Sol
* J73: Quainton, Buckinghamshire, England, UK ( Quainton Observatory date=20210115150816 )
* J74: Bilbao
* J75: OAM Observatory, La Sagra, Spain ( Observatorio Astronómico de La Sagra date=20171125131428 )
* J76: La Murta, Spain
* J77: Golden Hill Observatory, Stourton Caundle, Dorset, England, UK
* J78: Murcia
* J79: Observatorio Calarreona, Aguilas
* J80: Sainte Helene
* J81: Guirguillano
* J82: Leyland
* J83: Olive Farm Observatory, Hoghton
* J84: South Observatory, Clanfield
* J85: Makerstoun
* J86: Sierra Nevada Observatory (Observatorio de Sierra Nevada, Spain)
* J87: La Cañada (Observatorio de La Cañada (La Cañada Observatory), Ávila, Spain)
* J88: Strawberry Field Obs., Southampton
* J89: Tres Cantos Observatory
* J90: West Challow
* J91: Alt emporda Observatory, Figueres
* J92: Beaconsfield
* J93: Mount Tuffley Observatory, Gloucester, England, UK
* J94: Abbeydale, Gloucester, England, UK
* J95: Great Shefford, Berkshire, England, UK
* J96: Observatorio de Aras de los Olmos (OAO) - Universidad de Valencia, Aras de los Olmos, Valencia, Spain
* J97: Alginet
* J98: Observatorio Manises
* J99: Burjassot
== Z00-Z99 ==
* Z20: La Palma-MERCATOR
* Z69:  Observatorio Mazagón date=20200612213832  Huelva
* Z71:  Observatorio Norba Caesarina date=20160304000936 , Cáceres
* Z74: Amanecer de Arrakis, Sevilla
* Z75: Observatorio Sirius, Las Lomas
* Z76: Observatorio Carda, Villaviciosa
* Z83: Chicharronian 3C Observatory, Tres Cantos, Madrid
* Z88: Fosseway Observatoy, Stratton-on-the-Fosse
* Z92: West Park Observatory, Leeds
* Z95: Astronomía Para Todos Remote Observatory
* Z96: Observatorio Cesaraugusto
* Z97: OPERA Observatory, Saint Palais