牛宿增十

牛宿增十，即HD 192310、摩羯座5 G.（5 G. Capricorni）、葛利斯785（Gliese 785） ，又名CD-2714659、SAO 189065、HR 7722，是一颗位於摩羯座的恒星，视星等为5.73，位于銀經15.62，銀緯-29.38，其B1900.0坐标为赤經20h 9m 3.1s，赤緯-27° -29.38′ 53″。該恆星距離地球29光年，肉眼可見。雖然它被認為是變星，但尚未確認。 牛宿增十的質量大約是太陽的78%，光度基於不同的測定方式，在太陽的79%到85%之間。該恆星較太陽年老，大約是75到89億年，金屬量大約與太陽相當。 牛宿增十的空間速度分量是（U, V, W）= (–69, –13, –14) km/s。而它環繞銀河系中心軌道的離心率是0.18，和銀河系中心的距離是8.1 kpc。 該恆星於2010年發現一顆質量相當於海王星的行星HD 192310 b，第二顆行星HD 192310 c則是於2011年使用高精度徑向速度行星搜索器的 GTO 程式和HD 85512 b以及天园增三的行星一起發現。第二顆行星因為缺乏它的完整軌道資料，其質量不確定性遠高於第一顆。這兩顆行星的組成可能和海王星類似，並且分別位於母恆星的適居帶內側和外側邊緣以外。 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. （原始内容存档于2020-02-07）.  VizieR Detailed Page. [2012-07-13]. （原始内容存档于2016-03-05）.  van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357  Gray, R. O.; et al, Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample, The Astronomical Journal, July 2006, 132 (1): 161–170, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770 , doi:10.1086/504637  Johnson, H. L.; et al. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99): 99. Bibcode:1966CoLPL...4...99J.  Nordström, B.; et al, The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs, Astronomy and Astrophysics, May 2004, 418: 989–1019, Bibcode:2004A&A...418..989N, arXiv:astro-ph/0405198 , doi:10.1051/0004-6361:20035959  Mamajek, Eric E.; Hillenbrand, Lynne A., Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics, The Astrophysical Journal, November 2008, 687 (2): 1264–1293, Bibcode:2008ApJ...687.1264M, arXiv:0807.1686 , doi:10.1086/591785  Santos, N. C.; Israelian, G.; Mayor, M., The metal-rich nature of stars with planets, Astronomy and Astrophysics, July 2001, 373 (3): 1019–1031, Bibcode:2001A&A...373.1019S, arXiv:astro-ph/0105216 , doi:10.1051/0004-6361:20010648  Pasinetti Fracassini, L. E.; et al, Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics, Astronomy and Astrophysics, February 2001, 367: 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 , doi:10.1051/0004-6361:20000451  Ecuvillon, A.; et al, Nitrogen abundances in planet-harbouring stars, Astronomy and Astrophysics, May 2004, 418 (2): 703–715, Bibcode:2004A&A...418..703E, arXiv:astro-ph/0401396 , doi:10.1051/0004-6361:20035717  Pepe, F.; et al, The HARPS search for Earth-like planets in the habitable zone: I – Very low-mass planets around HD20794, HD85512 and HD192310, VizieR On-line Data Catalog: J/A+A/534/A58, 2011, Bibcode:2011yCat..35349058P, arXiv:1108.3447 , doi:10.1051/0004-6361/201117055  Porto de Mello, Gustavo; del Peloso, Eduardo F., Astrobiologically Interesting Stars Within 10 Parsecs of the Sun, Astrobiology, April 2006, 6 (2): 308–331, Bibcode:2006AsBio...6..308P, PMID 16689649, arXiv:astro-ph/0511180 , doi:10.1089/ast.2006.6.308  Schneider, Jean, Gl 785, Extrasolar Planets Encyclopaedia, [2011-10-29], （原始内容存档于2011-11-18）  Schneider, Jean, HD 192310 c, Extrasolar Planets Encyclopaedia, [2011-10-29], （原始内容存档于2011-11-08）  CD-27 14659 / HR 7722. SolStation. [2007-05-11]. （原始内容存档于2012-04-03）.