# List of long-period comets

The following list is of comets with very long orbital periods, defined as between 200 and 1000 years. These comets come from the Kuiper belt and scattered disk, beyond the orbit of Pluto, with possible origins in the Oort cloud for many. For comets with an orbital period of over 1000 years (semi-major axis greater than ~100 AU), see the List of near-parabolic comets.
| Comet designation | Name/ discoverer(s) | Period (years) | e | a (AU) | q (AU) | i (°) | Abs. mag (M1) | Last observed perihelion | Next perihelion |
| C/1811 W1 | Pons | 755 | 0.9809 | 82.881 | 1.5817 | 31.2554 | | 1811/11/11 | 2566 |
| C/1840 U1 | Bremiker | 286 | 0.9659 | 43.453 | 1.48 | 57.9043 | | 1840/11/14 | 2126 |
| C/1843 D1 | Great Comet of 1843 | 513 | 0.999914 | 64.267 | 0.005527 | 144.3548 | | 1843/02/27 | 2356 |
| C/1846 J1 | Brorsen | 538 | 0.990414 | 66.1131 | 0.63376 | 150.6809 | | 1846/06/05 | 2384 |
| C/1853 G1 | Schweizer | 781 | 0.989286 | 84.8136 | 0.908693 | 122.1955 | | 1853/05/10 | 2634 |
| C/1855 G1 | Schweizer | 500 | 0.965185 | 63.0052 | 2.193526 | 128.5764 | | 1855/02/05 | 2355 |
| C/1855 L1 | Donati | 252 | 0.98578 | 39.9131 | 0.567564 | 156.8707 | | 1855/05/30 | 2107 |
| C/1857 O1 | Peters | 235 | 0.980414 | 38.1315 | 0.746843 | 32.7565 | | 1857/08/24 | 2092 |
| C/1861 G1 | A. E. Thatcher | 415 | 0.983465 | 55.6819 | 0.9207 | 79.7733 | | 1861/06/03 | 2276 |
| C/1861 J1 | Great Comet of 1861 | 409 | 0.98507 | 55.0827 | 0.822384 | 85.4424 | | 1861/06/12 | 2270 |
| C/1874 Q1 | Coggia | 306 | 0.962822 | 45.4028 | 1.687985 | 34.1267 | | 1874/07/18 | 2180 |
| C/1882 R1-A | Great September Comet of 1882 | 669 | 0.999899 | 76.7327 | 0.00775 | 142.0112 | | 1882/09/17 | 2551 |
| C/1882 R1-B | Great September Comet of 1882 | 759 | 0.999907 | 83.3441 | 0.007751 | 142.0111 | | 1882/09/17 | 2641 |
| C/1882 R1-C | Great September Comet of 1882 | 874 | 0.999915 | 91.1882 | 0.007751 | 142.0105 | | 1882/09/17 | 2756 |
| C/1882 R1-D | Great September Comet of 1882 | 952 | 0.99992 | 96.8625 | 0.007749 | 142.0093 | | 1882/09/17 | 2834 |
| C/1885 R1 | Brooks | 275 | 0.982264 | 42.2389 | 0.749149 | 59.097 | | 1885/08/10 | 2160 |
| C/1886 H1 | Brooks | 768 | 0.996783 | 83.8679 | 0.269803 | 33.8679 | | 1886/06/07 | 2654 |
| C/1887 B2 | Brooks | 999 | 0.983694 | 99.9721 | 1.630145 | 104.2738 | | 1887/03/17 | 2986 |
| C/1894 G1 | Gale | 958 | 0.989884 | 97.176 | 0.983032 | 86.9666 | | 1894/04/13 | 2852 |
| C/1898 F1 | Perrine | 419 | 0.980454 | 56.035 | 1.095261 | 72.5292 | | 1898/03/17 | 2317 |
| C/1905 F1 | Giacobini | 220 | 0.9 | 36 | 1.11 | 40 | | 1905/04/04 | 2125 |
| C/1906 V1 | Thiele | 420 | 0.979 | 56 | 1.2122 | 56.35 | | 1906/11/21 | 2300 |
| C/1930 F1 | Wilk | 485 | 0.992194 | 61.723 | 0.48181 | 67.1409 | | 1930/03/28 | 2415 |
| C/1931 O1 | Nagata | 357 | 0.979203 | 50.3391 | 1.046903 | 42.2957 | | 1931/06/11 | 2288 |
| C/1932 G1 | Houghton-Ensor | 302 | 0.972127 | 45.0052 | 1.254431 | 74.2776 | | 1932/02/28 | 2234 |
| C/1932 P1 | Peltier–Whipple | 291 | 0.976369 | 43.8914 | 1.037198 | 71.7195 | | 1932/09/01 | 2223 |
| C/1932 Y1 | Dodwell-Forbes | 262 | 0.972386 | 40.9498 | 1.130788 | 24.5025 | | 1932/12/30 | 2194 |
| C/1935 A1 | Johnson | 901 | 0.991304 | 93.2783 | 0.811148 | 65.4251 | | 1935/02/26 | 2836 |
| C/1936 O1 | Kaho–Kozik–Lis | 888 | 0.994389 | 92.3905 | 0.518403 | 121.9417 | | 1936/06/15 | 2824 |
| C/1937 P1 | Hubble | 599 | 0.972499 | 71.0395 | 1.953657 | 11.5806 | | 1936/11/14 | 2535 |
| C/1940 O1 | Whipple–Paraskevopoulos | 425 | 0.980843 | 56.4926 | 1.082228 | 54.6906 | | 1940/10/08 | 2365 |
| C/1941 B1 | Friend-Reese-Honda | 355 | 0.981221 | 50.1552 | 0.941864 | 26.2756 | | 1941/01/20 | 2296 |
| C/1952 H1 | Mrkos | 645 | 0.982816 | 74.6448 | 1.282696 | 112.0282 | | 1952/06/08 | 2597 |
| C/1955 L1 | Mrkos | 356 | 0.989361 | 50.2321 | 0.534419 | 86.5016 | | 1955/06/04 | 2311 |
| C/1961 T1 | Seki | 759 | 0.991812 | 83.1862 | 0.681129 | 155.707 | | 1961/10/10 | 2720 |
| C/1963 A1 | Ikeya | 932 | 0.993377 | 95.446 | 0.632139 | 160.6487 | | 1963/03/21 | 2895 |
| C/1963 R1 | Pereyra | 903 | 0.999946 | 93.7963 | 0.005065 | 133.5821 | | 1963/08/23 | 2866 |
| C/1964 N1 | Ikeya | 391 | 0.984643 | 53.5099 | 0.821752 | 171.92 | | 1964/08/01 | 2355 |
| C/1965 S1-A | Ikeya–Seki | 880 | 0.999915 | 91.6 | 0.007786 | 141.8642 | | 1965/10/21 | 2845 |
| C/1973 H1 | Huchra | 829 | 0.972977 | 88.2336 | 2.384337 | 48.329 | | 1973/03/11 | 2802 |
| C/1974 O1 | Cesco | 551 | 0.979579 | 67.2323 | 1.372951 | 173.1585 | | 1974/05/12 | 2525 |
| C/1975 T2 | Suzuki-Saigusa-Mori | 446 | 0.985653 | 58.4127 | 0.838047 | 118.2332 | | 1975/10/15 | 2421 |
| C/1979 S1 | Meier | 391 | 0.973197 | 53.4299 | 1.432081 | 67.084 | | 1979/10/17 | 2370 |
| C/1979 Y1 | Bradfield | 303 | 0.98792 | 45.1 | 0.54526 | 148.6024 | 8.4 | 1979/12/21 | 2282 |
| C/1983 H1 | IRAS-Araki-Alcock | 968 | 0.98987 | 97.86 | 0.9913399 | 73.2526 | 12.599 | 1983/05/21 | 2951 |
| C/1984 U2 | Shoemaker | 270 | 0.970905 | 41.7429 | 1.21451 | 13.8812 | | 1985/01/03 | 2255 |
| C/1985 T1 | Thiele | 700 | 0.983297 | 78.8565 | 1.31714 | 139.0692 | | 1985/12/19 | 2685 |
| C/1986 E1 | Shoemaker | 555 | 0.94678 | 67.5284 | 3.593864 | 159.809 | | 1986/03/11 | 2541 |
| C/1987 B2 | Terasako | 724 | 0.995125 | 80.6195 | 0.39302 | 40.8543 | | 1986/12/24 | 2710 |
| C/1992 Q2 | Helin–Lawrence | 452 | 0.965365 | 58.8554 | 2.038458 | 106.8481 | | 1993/03/15 | 2445 |
| C/1992 W1 | Ohshita | 719 | 0.99721 | 80.2191 | 0.664134 | 115.1232 | | 1992/11/01 | 2711 |
| C/1994 E1 | Mueller | 408 | 0.968171 | 55.0218 | 1.75129 | 145.1425 | | 1993/11/28 | 2401 |
| C/1995 Q2 | Hartley-Drinkwater | 424 | 0.966518 | 56.4229 | 1.889153 | 168.0075 | | 1995/08/02 | 2419 |
| C/1997 O1 | Tilbrook | 811 | 0.98422 | 86.96 | 1.371807 | 115.8024 | 8 | 1997/07/13 | 2808 |
| C/1998 K1 | Mueller | 491 | 0.94511 | 62.2 | 3.41659 | 35.6361 | 8 | 1998/09/01 | 2489 |
| C/1998 K5 | LINEAR | 616 | 0.98669 | 72.39 | 0.9635469 | 9.92714 | 16.1 | 1998/07/17 | 2613 |
| C/1999 L3 | LINEAR | 683.5 | 0.97437 | 77.59 | 1.988917 | 166.09928 | 8.8 | 2000/01/04 | 2683/06/01 |
| C/2000 J1 | Ferris | 370 | 0.951 | 51 | 2.5417 | 98.78 | 14.2 | 2000/05/11 | 2370 |
| C/2001 S1 | Skiff | 388 | 0.9295 | 53.2 | 3.749 | 139.1322 | 5.9 | 2001/06/02 | 2389 |
| C/2002 Q2 | LINEAR | 420 | 0.977 | 56 | 1.3029 | 96.76 | 16.4 | 2002/08/17 | ~2450 |
| C/2003 H2 | LINEAR | 235.9 | 0.94293 | 38.18 | 2.17853 | 72.218 | 14.2 | 2003/05/17 | 2239/05/01 |
| C/2003 K1 | Spacewatch | 250 | 0.947 | 40 | 2.086 | 129.81 | 14.4 | 2002/12/20 | 2250 |
| C/2003 S4-A | LINEAR | 224 | 0.895 | 36.9 | 3.874 | 40.71 | 12.3 | 2004/05/30 | 2230 |
| C/2003 S4-B | LINEAR | 253 | 0.904 | 40 | 3.84 | 40.43 | 12.4 | 2004/05/23 | 2250 |
| C/2004 DZ$_{61}$ | Catalina (CSS)–LINEAR | 309.81 | 0.956027 | 45.786 | 2.01333 | 66.80929 | 12.4 | 2004/05/26 | 2314/04/01 |
| C/2004 HV$_{60}$ | Spacewatch | 347.80 | 0.938 | 49.46 | 3.07 | 92.53 | 13 | 2003/12/16 | 2351 |
| C/2004 K3 | LINEAR | 438 | 0.9809 | 57.7 | 1.10334 | 111.9279 | 16.9 | 2004/06/30 | 2440 |
| C/2005 H1 | LINEAR | 314.4 | 0.89687 | 46.24 | 4.7686 | 81.5121 | 9.8 | 2004/10/28 | 2319/04/01 |
| C/2005 N4 | Catalina (CSS) | 444 | 0.9604 | 58.2 | 2.30373 | 116.6298 | 14.2 | 2005/07/02 | 2450 |
| C/2005 O1 | NEAT | 365 | 0.9297 | 51.1 | 3.5909 | 155.981 | 6.3 | 2005/05/17 | 2370 |
| C/2005 P3 | SWAN | 279 | 0.98768 | 42.7 | 0.52578 | 89.708 | 14.2 | 2005/08/09 | 2285 |
| C/2006 S5 | Hill | 961.7 | 0.973002 | 97.430 | 2.630434 | 10.13138 | 9.6 | 2007/12/09 | 2969/08/28 |
| C/2007 D2 | Spacewatch | 420 | 0.97771 | 56 | 1.2457 | 178.618 | 15.4 | 2006/11/24 | 2425 |
| C/2007 E1 | Garradd | 524.06 | 0.980218 | 65.001 | 1.2858628 | 174.394 | 13.7 | 2007/05/23 | 2531/06/01 |
| C/2007 H2 | Skiff | 351.67 | 0.9717 | 49.822 | 1.4105 | 52.191 | 15.9 | 2007/02/17 | 2358 |
| C/2007 K5 | Lovejoy | 340 | 0.9766 | 49 | 1.1491 | 64.884 | 12 | 2007/05/01 | 2350 |
| C/2007 T5 | Gibbs | 320.98 | 0.91362 | 46.88 | 4.049254 | 45.61521 | 10 | 2008/05/24 | 2328/05/01 |
| C/2008 H1 | LINEAR | 371 | 0.9465 | 51.6 | 2.76026 | 75.492 | 10.4 | 2008/03/16 | 2380 |
| C/2008 J5 | Garradd | 616 | 0.97288 | 72.4 | 1.96384 | 93.271 | 10.6 | 2008/04/01 | 2625 |
| C/2008 X3 | LINEAR | 289.6 | 0.95654 | 43.77 | 1.90213 | 66.4751 | 11.8 | 2008/10/10 | 2298 |
| C/2009 B2 | LINEAR | 270 | 0.9443 | 41.8 | 2.32762 | 156.873 | 13 | 2009/03/07 | 2279 |
| C/2009 E1 | Itagaki | 254.67 | 0.985073 | 40.177 | 0.5997215 | 127.4534 | 13.5 | 2009/04/07 | 2263/12/01 |
| C/2009 F5 | McNaught | 718 | 0.972 | 80.2 | 2.24534 | 84.9905 | 10.2 | 2008/11/04 | 2726 |
| C/2009 K4 | Gibbs | 268 | 0.9628 | 41.6 | 1.5489 | 34.8248 | 13.8 | 2009/06/19 | 2280 |
| C/2010 D4 | WISE | 520.1 | 0.88947 | 64.67 | 7.14822 | 105.65965 | 8.4 | 2009/03/30 | 2519/05/01 |
| C/2010 DG$_{56}$ | WISE | 555 | 0.97644 | 67.54 | 1.591452 | 160.41734 | 14.3 | 2010/05/15 | 2565 |
| C/2010 F1 | Boattini | 566 | 0.9476 | 68.4 | 3.58752 | 64.936 | 6.3 | 2009/11/10 | 2575 |
| C/2010 F3 | Scotti | 497.7 | 0.91327 | 62.8 | 5.44669 | 4.64758 | 9.8 | 2010/08/04 | 2508 |
| C/2010 G2 | Hill | 943.41 | 0.9794077 | 96.19 | 1.9807735 | 103.745293 | 9 | 2011/09/02 | 2955/02/01 |
| C/2010 J1 | Boattini | 222.5 | 0.9538 | 36.72 | 1.69566 | 134.3849 | 11.4 | 2010/02/04 | 2232 |
| C/2010 KW$_7$ | WISE | 997.7 | 0.97425 | 99.84 | 2.570441 | 147.06087 | 12.3 | 2010/10/11 | 3008 |
| C/2010 L4 | WISE | 717 | 0.9647 | 80.1 | 2.8255 | 102.818 | 12.8 | 2010/02/23 | 2726 |
| C/2011 KP$_{36}$ | Spacewatch | 238.03 | 0.872862 | 38.4077 | 4.883081 | 18.985920 | 7.3 | 2016/05/27 | 2254/06/05 |
| C/2011 Q4 | SWAN | 282.35 | 0.974157 | 43.039 | 1.112228 | 147.84307 | 11.8 | 2011/09/21 | 2294/01/27 |
| C/2011 W3 | Lovejoy | 698 | 0.9999294 | 78.7 | 0.0055538 | 134.356 | 15.3 | 2011/12/16 | 2710 |
| C/2012 F1 | Gibbs | 630 | 0.965 | 74 | 2.5509 | 129.3968 | 13.8 | 2012/02/19 | 2645 |
| C/2012 Y1 | LINEAR | 233.8 | 0.94687 | 37.95 | 2.0162 | 20.9594 | 15.1 | 2013/01/18 | 2246 |
| C/2013 J6 | Catalina (CSS) | 463 | 0.9596 | 59.9 | 2.41572 | 85.055 | 12.7 | 2013/04/09 | 2475 |
| C/2013 K1 | Christensen | 713 | 0.98811 | 79.8 | 0.948263 | 42.3415 | 18.4 | 2013/05/30 | 2725 |
| C/2013 N4 | Borisov | 333 | 0.974805 | 48.04 | 1.210405 | 37.03523 | 10.6 | 2013/08/21 | 2346 |
| C/2013 PE$_{67}$ | Catalina (CSS)–Spacewatch | 415.1 | 0.966806 | 55.64 | 1.847072 | 116.71754 | 13.3 | 2013/12/09 | 2429/01/01 |
| C/2013 UQ$_4$ | Catalina (CSS) | 471.43 | 0.9821538 | 60.572 | 1.08097487 | 145.25856 | 11.4 | 2014/07/05 | 2485/12/09 |
| C/2014 G3 | PANSTARRS | 421 | 0.9164 | 56.2 | 4.6986 | 155.8268 | 5.5 | 2015/02/02 | 2436 |
| C/2014 S3 | PANSTARRS | 900 | 0.977 | 90 | 2.049 | 169.321 | 17.7 | 2014/08/13 | 2900 |
| C/2015 D4 | Borisov | 700 | 0.98907 | 78.8 | 0.86168 | 77.3017 | 9.4 | 2014/10/28 | 2714 |
| C/2015 F2 | Polonia | 237.6 | 0.96844 | 38.36 | 1.210552 | 28.6937 | 14.9 | 2015/04/28 | 2252/11/29 |
| C/2015 T4 | PANSTARRS | 812.2 | 0.973620 | 87.05 | 2.296376 | 87.91718 | 7.0 | 2016/06/18 | 2828 |
| C/2016 A8 | LINEAR | 207.6 | 0.94635 | 35.06 | 1.881129 | 148.21184 | 10.3 | 2016/08/30 | 2224 |
| C/2016 C2 | NEOWISE | 512 | 0.97563 | 64.00 | 1.559751 | 38.1565 | 13.8 | 2016/04/19 | 2528 |
| C/2016 R3 | Borisov | 997.76 | 0.9955 | 99.849 | 0.4468 | 53.067 | 18.1 | 2016/10/10 | 3014 |
| C/2017 A1 | PANSTARRS | 800 | 0.974 | 90 | 2.290 | 49.81 | 13.1 | 2017/05/17 | 2800 |
| C/2017 A3 | Elenin | 285.45 | 0.911 | 43.35 | 3.8545 | 98.5 | 9.7 | 2017/01/30 | 2302 |
| C/2017 C2 | PANSTARRS | 976.33 | 0.9753 | 98.414 | 2.431 | 118.584 | 12 | 2017/01/21 | 2993 |
| C/2018 E1 | ATLAS | 403.05 | 0.9504 | 54.5634 | 2.7055 | 72.4796 | 11.7 | 2018/4/17 | 2421 |
| C/2019 A9 | PANSTARRS | 242.22 | 0.9633 | 38.8574 | 1.4264 | 84.3402 | 9.0 | 2019/07/26 | 2261 |
| C/2019 J1 | Lemmon | 609.24 | 0.96551 | 71.8650 | 2.4788 | 24.5502 | 11.8 | 2019/04/09 | 2628 |
| C/2019 O2 | PANSTARRS | 434.1 | 0.8311 | 57.22 | 9.683 | 93.287 | 10.1 | 2023/04/07 | 2457 |
| C/2019 Y4-D | ATLAS | 491.16 | 0.996 | 62.25 | 0.25 | 45.88 | 13.5 | 2020/05/31 | 2511 |
| C/2020 B2 | Lemmon | 559.27 | 0.959 | 67.88 | 2.768 | 55.704 | 17.2 | 2020/01/26 | 2579 |
| C/2020 K4 | PANSTARRS | 299.66 | 0.9604 | 44.7795 | 1.7723 | 125.907 | 16.9 | 2020/03/06 | 2320 |
| C/2020 Q1 | Borisov | 454.78 | 0.97776 | 59.137 | 1.315 | 142.924 | 11.6 | 2020/08/14 | 2501 |
| C/2020 R4 | ATLAS | 933.77 | 0.98924 | 95.5331 | 1.0283 | 164.462 | 16.0 | 2021/03/01 | 2955 |
| C/2020 U3 | Rankin | 519.34 | 0.96477 | 64.61 | 2.2762 | 30.177 | 11.9 | 2021/02/05 | 2540 |
| C/2020 X4 | Leonard | 312.03 | 0.88679 | 46.00 | 5.2083 | 80.4859 | 9.1 | 2020/11/11 | 2332 |
| C/2021 A4 | NEOWISE | 280.22 | 0.97325 | 42.82 | 1.1455 | 111.57 | 13.7 | 2021/03/20 | 2301 |
| C/2021 A10 | NEOWISE | 894.04 | 0.98633 | 92.804 | 1.269 | 151.52 | 19.6 | 2021/03/15 | 2915 |
| C/2021 B2 | NEOWISE | 206.66 | 0.9382 | 34.953 | 2.160 | 119.49 | 13.9 | 2021/03/10 | 2227 |
| C/2021 C3 | Catalina (CSS) | 503.89 | 0.9640 | 63.321 | 2.2765 | 122.16 | 16.1 | 2021/02/12 | 2525 |
| C/2021 D1 | SWAN | 947.05 | 0.9904 | 96.44 | 0.9018 | 31.27 | 13.3 | 2021/02/27 | 2969 |
| C/2021 G1 | Leonard | 646.49 | 0.9547 | 75.535 | 3.424 | 131.57 | 13.7 | 2021/07/22 | 2667 |
| C/2021 Q3 | ATLAS | 641.70 | 0.9300 | 74.396 | 5.205 | 77.78 | 6.8 | 2022/01/26 | 2662 |
| C/2021 U4 | Leonard | 300.59 | 0.9601 | 44.872 | 1.787 | 152.88 | 18.8 | 2021/12/21 | 2322 |
| C/2022 J1 | Maury-Attard | 329.62 | 0.9664 | 47.716 | 1.604 | 105.93 | 11.9 | 2022/02/19 | 2351 |
| C/2022 J2 | Bok | 877.30 | 0.9801 | 91.642 | 1.827 | 149.09 | 18.3 | 2022/10/27 | 2900 |
| C/2022 JK$_5$ | PANSTARRS | 283.53 | 0.9377 | 43.158 | 2.687 | 16.83 | 13.46 | 2023/04/28 | 2306 |
| C/2022 N1 | Attard-Maury | 224.28 | 0.9599 | 36.913 | 1.482 | 164.74 | 14.9 | 2022/09/10 | 2247 |
| C/2022 U2 | ATLAS | 937.03 | 0.9861 | 95.755 | 1.328 | 48.25 | 13.5 | 2023/01/14 | 2960 |
| C/2022 V2 | Lemmon | 223.12 | 0.944 | 36.786 | 2.064 | 98.91 | 13.6 | 2023/11/01 | 2246 |
| C/2023 P1 | Nishimura | 434.7 | 0.996 | 57.386 | 0.225 | 132.47 | 12.7 | 2023/09/17 | 2431 |
| C/2023 TD$_{22}$ | Lemmon | 334.1 | 0.951 | 48.18 | 2.356 | 170.49 | 12.7 | 2024/09/16 | 2358 |
| C/2024 C4 | ATLAS | 774.2 | 0.983 | 84.31 | 1.471 | 79.29 | 13.2 | 2024/01/20 | 2798 |
| C/2024 E2 | Bok | 382.1 | 0.854 | 52.66 | 7.692 | 155.66 | 8.6 | 2023/10/22 | 2405 |
| C/2024 E2 | Bok | 382.1 | 0.854 | 52.66 | 7.692 | 155.66 | 8.6 | 2023/10/22 | 2405 |
| C/2024 Q4 | PANSTARRS | 349.25 | 0.893 | 49.593 | 5.328 | 3.34 | 10.2 | 2024/12/18 | 2373 |
| Used sources: MPC—List Periodic Comet Numbers IAU–CBAT: 200 Most Recent IAUCs IAU–CBAT: Astronomical Headlines PDS SBN—Planetary Data System Small Bodies Node: Periodic Comet Names and Designations JPL Small-Body Database Browser ||||||||||