ADS 7251

ADS 7251是一個位於大熊座的雙星系統，距離太陽有6.33秒差距(20.66光年）。 這兩顆恆星共享一個略微偏心的軌道，其半長軸為16.725″，週期為975年。 ADS 7251 A比ADS 7251 B亮0.06星等。MK光譜等級目錄將兩顆恆星列為二級標準，ADS 7251 A為M0V級，ADS 7251 B為K7V級，在具有較晚光譜類型的較亮恆星。 ADS 7251 B也稱為Gliese 338B或 HD 79211，由一顆已知的超級地球圍繞其運行，並通過徑向速度檢測到。 2MASS infrared magnitudes flagged as unreliable or upper limits Calculated from 2MASS magnitudes Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. Huang, Y.; Liu, X. -W.; Yuan, H. -B.; Xiang, M. -S.; Chen, B. -Q.; Zhang, H. -W. Empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs and giants based on interferometric data. Monthly Notices of the Royal Astronomical Society. 2015, 454 (3): 2863. Bibcode:2015MNRAS.454.2863H. S2CID 118487917. arXiv:1508.06080 . doi:10.1093/mnras/stv1991.  Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. Kirkpatrick, J. D.; et al. A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9. Astrophysical Journal Supplement Series. 1991, 77: 417. Bibcode:1991ApJS...77..417K. doi:10.1086/191611.  Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). CDS/ADC Collection of Electronic Catalogues. 2003, 2246: II/246 [2023-03-22]. Bibcode:2003yCat.2246....0C. （原始内容存档于2021-04-21）.  Bobylev, V. V.; Goncharov, G. A.; Bajkova, A. T. VizieR Online Data Catalog: Orion Spiral Arm CAtalogue (OSACA) (Bobylev+, 2006). VizieR On-line Data Catalog. 2007. Bibcode:2007yCat..90830821B.  Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs. The Astronomical Journal. 2019, 158 (2): 56. Bibcode:2019AJ....158...56H. S2CID 159041104. arXiv:1905.07921 . doi:10.3847/1538-3881/ab23fe.  Malkov, O. Yu.; et al. Dynamical Masses of a Selected Sample of Orbital Binaries. Astronomy & Astrophysics. 2012, 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774 . A69.  González-Álvarez, E.; Osorio, M. R. Zapatero; Caballero, J. A.; Sanz-Forcada, J.; Béjar, V. J. S.; González-Cuesta, L.; Dreizler, S.; Bauer, F. F.; Rodríguez, E.; Tal-Or, L.; Zechmeister, M. The CARMENES search for exoplanets around M dwarfs. A super-Earth planet orbiting HD 79211 (GJ 338 B). Astronomy & Astrophysics. May 2020, 637: A93. Bibcode:2020A&A...637A..93G. ISSN 0004-6361. arXiv:2003.13052 . doi:10.1051/0004-6361/201937050 .  Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog. The Astronomical Journal. 2001, 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920 .  Ditomasso, Victoria; et al, Independent Validation of the Temperate Super-Earth HD 79211 b using HARPS-N, The Astronomical Journal, 2023, 165 (2): 38, Bibcode:2023AJ....165...38D, S2CID 253098124, arXiv:2210.12211 , doi:10.3847/1538-3881/ac9ccd