羽林军六Lambda Piscis AustriniLambda PsAλ Piscis Austriniλ PsA)是在南天星座南鱼座的一颗孤独的[10]蓝白色调恒星,它可以用裸眼看见,视星等为5.42等[2]。依据从地球测量的年周视差为6.51mas,它与太阳的距离约为500光年。在这个距离上,由于星际尘埃消光的因素,恒星的视星等为降低0.16星等[5]

羽林军六(南鱼座λ)
图示南鱼座的恒星位置与边界,以及周围相邻的星座。
羽林军六的位置(圆圈)
观测资料
历元 J2000.0
星座 南鱼座
星官 羽林军室宿
赤经 22h 14m 18.75180s[1]
赤纬 −27° 46′ 00.8667″[1]
视星等(V) +5.42[2]
特性
光谱分类B7 V[3]
B−V 色指数−0.12[2]
天体测定
径向速度 (Rv)−6.20[4] km/s
自行 (μ) 赤经:+23.60[1] mas/yr
赤纬:−6.20[1] mas/yr
视差 (π)6.51 ± 0.33[1] mas
距离500 ± 30 ly
(154 ± 8 pc)
绝对星等 (MV)−0.13[5]
详细资料
质量3.58±0.08[6] M
半径4.2[7] R
亮度249[6] L
温度12,023[6] K
自转速度 (v sin i)50[8] km/s
其他命名
λ PsA16 Piscis AustriniCPD−28° 7566、FK5 838、HD 210934、HIP 109789、HR 8478、SAO 190985[9]
参考数据库
SIMBAD资料

这是一颗类型为B7V的B型主序星 [3],估计它的质量是太阳质量的3.58倍[6],半径是太阳半径的4.2倍[7]。这颗恒星的投影转速是每秒50公里[8],并且在主序带的生命已经渡过76%。它在光球层的有效温度是12,023K,辐射的光度是太阳光度的249倍[6]

羽林军六在银河系相对于太阳的运动速度是每秒18.1公里,它投射的银河轨道让它在距离银河中心23,800至29,300光年的轨道上运动之间[11][来源可靠?]

名称

编辑

中国,它与宝瓶座29宝瓶座35宝瓶座41宝瓶座47宝瓶座49HD212448南鱼座ε南鱼座21南鱼座20南鱼座υ宝瓶座68宝瓶座66宝瓶座61宝瓶座53宝瓶座50宝瓶座56宝瓶座45宝瓶座58宝瓶座64宝瓶座65宝瓶座705宝瓶座74宝瓶座τ2宝瓶座τ1宝瓶座δ宝瓶座77宝瓶座88宝瓶座89宝瓶座86宝瓶座101宝瓶座100宝瓶座99宝瓶座98宝瓶座97宝瓶座94宝瓶座ψ3宝瓶座ψ2宝瓶座ψ1宝瓶座87宝瓶座85宝瓶座83宝瓶座χ宝瓶座ω1宝瓶座ω2组成星官羽林军。羽林军的意思是皇帝的禁卫军,专责保卫皇帝和皇宫;羽林军六(南鱼座λ)是其中的第六颗星[12]

参考资料

编辑
  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 Corben, P. M.; Stoy, R. H., Photoelectric Magnitudes and Colours for Bright Southern Stars, Monthly Notes of the Astronomical Society of Southern Africa, 1968, 27: 11, Bibcode:1968MNSSA..27...11C. 
  3. ^ 3.0 3.1 Houk, Nancy, Michigan catalogue of two-dimensional spectral types for the HD stars 3, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, 1979, Bibcode:1982mcts.book.....H. 
  4. ^ Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system, Astronomy Letters, November 2006, 32 (11): 759–771, Bibcode:2006AstL...32..759G, arXiv:1606.08053 , doi:10.1134/S1063773706110065. 
  5. ^ 5.0 5.1 Gontcharov, G. A., Spatial distribution and kinematics of OB stars, Astronomy Letters, November 2012, 38 (11): 694–706, Bibcode:2012AstL...38..694G, arXiv:1606.09028 , doi:10.1134/S1063773712110035. 
  6. ^ 6.0 6.1 6.2 6.3 6.4 Zorec, J.; Royer, F., Rotational velocities of A-type stars. IV. Evolution of rotational velocities, Astronomy & Astrophysics, January 2012, 537: A120, Bibcode:2012A&A...537A.120Z, arXiv:1201.2052 , doi:10.1051/0004-6361/201117691. 
  7. ^ 7.0 7.1 Pasinetti Fracassini, L. E.; et al, Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS), Astronomy and Astrophysics 3rd, February 2001, 367: 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 , doi:10.1051/0004-6361:20000451. 
  8. ^ 8.0 8.1 Abt, Helmut A.; et al, Rotational Velocities of B Stars, The Astrophysical Journal, July 2002, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590. 
  9. ^ lam PsA -- Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2017-05-18], (原始内容存档于2020-11-05). 
  10. ^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, September 2008, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x. 
  11. ^ Lambda Piscis Austrini (HIP 109789) Archive.is存档,存档日期2013-04-14
  12. ^ (中文) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育资讯网 2006 年 7 月 7 日页面存档备份,存于互联网档案馆