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軒轅十一
Adhafera
ζ Leo
	紅色圓圈中即軒轅十一
觀測資料; 曆元 J2000
星座	獅子座
星官	星宿軒轅
赤經	10h 16m 41.41597s
赤緯	+23° 25′ 02.3221″
視星等（V）	3.33
特性
光谱分类	F0 III
U−B 色指数	+0.07
B−V 色指数	+0.30
变星类型	Suspected
天体测定
徑向速度 (Rv)	-15.6 km/s
自行 (μ)	赤经：+18.39 mas/yr ; 赤纬：-6.84 mas/yr
视差 (π)	11.90 ± 0.18 mas
距离	274 ± 4 ly ; (84 ± 1 pc)
詳細資料
質量	3 M☉
半徑	6 R☉
表面重力 (log g)	3.0
亮度	85 L☉
溫度	6,792 K
金属量 [Fe/H]	–0.03 dex
自轉速度 (v sin i)	72.4 km/s
其他命名
	Adhafera, Aldhafera, Adhafara, ζ Leo, 36 Leo, HR 4031, BD +24°2209, HD 89025, FK5 384, HIP 50335, SAO 81265, GC 14107, NSV 04804, WDS 10167+2325A.
參考資料庫
SIMBAD	资料

軒轅十一，即獅子座ζ（Zeta Leonis、ζ Leo、ζ Leonis），是獅子座一顆視星等3等的恆星。它的西方固有名稱 Adhafera（或 Aldhafera, Adhafara）是來自阿拉伯語的 الضفيرة（al-ðafīrah），是指獅子的鬃毛。軒轅十一是在軒轅十二之後構成「鐮刀」刀鋒的第二顆恆星^[10]。

恆星狀態

軒轅十一是一顆光譜類型F0 III的巨星。自1943年起它的光譜就成為將其他恆星光譜分類時的標準^[4]。它的視星等+3.44，但光度是太陽的85倍^[7]。軒轅十一的質量大約是太陽的3倍^[6]，半徑則是太陽的6倍^[7]。依巴谷卫星量測其視差的結果顯示它距離地球大約274光年（84秒差距）^[1]。

軒轅十一和視星等5.90的獅子座35是光學雙星。獅子座35在天球上沿著位置角340°處距離軒轅十一325.9角秒^[11]^[12]，但兩者並非聯星系統，獅子座35距離地球只有100光年。

參見

狮子座恒星列表

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
^ ^2.0 ^2.1 ^2.2 Fernie, J. D., New UBVRI photometry for 900 supergiants, Astrophysical Journal Supplement Series, May 1983, 52: 7–22, Bibcode:1983ApJS...52....7F, doi:10.1086/190856
^ Montes, D.; et al, Late-type members of young stellar kinematic groups - I. Single stars, Monthly Notices of the Royal Astronomical Society, November 2001, 328 (1): 45–63, Bibcode:2001MNRAS.328...45M, arXiv:astro-ph/0106537 , doi:10.1046/j.1365-8711.2001.04781.x
^ ^4.0 ^4.1 Garrison, R. F., Anchor Points for the MK System of Spectral Classification, Bulletin of the American Astronomical Society, December 1993, 25: 1319 [2012-02-04], Bibcode:1993AAS...183.1710G, （原始内容存档于2019-06-25）
^ Wielen, R.; et al, Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, 1999, Bibcode:1999VeARI..35....1W
^ ^6.0 ^6.1 Kaler, James B., ADHAFERA (Zeta Leonis), Stars (University of Illinois), [2010-05-12], （原始内容存档于2016-11-04）
^ ^7.0 ^7.1 ^7.2 ^7.3 ^7.4 ^7.5 ^7.6 Massarotti, Alessandro; et al, Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity, The Astronomical Journal, January 2008, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209
^ Gray, R. O.; Graham, P. W.; Hoyt, S. R., The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence, The Astronomical Journal, April 2001, 121 (4): 2159–2172, Bibcode:2001AJ....121.2159G, doi:10.1086/319957
^ zet Leo -- Variable Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2010-05-12], （原始内容存档于2016-04-02）
^ Proctor, Mary, Evenings with the Stars, Popular Astronomy, 1896–7, 4: 565 请检查|date=中的日期值 (帮助)
^ CCDM (Catalog of Components of Double & Multiple stars (Dommanget+ 2002), VizieR (Centre de Données astronomiques de Strasbourg), [2010-05-12], （原始内容存档于2020-08-11）
^ Adhafera, Alcyone Bright Star Catalogue, [2010-05-12], （原始内容存档于2018-07-02）

[aaa474_2_653-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357

[apjss52_7-2] 2.0 ^2.1 ^2.2 Fernie, J. D., New UBVRI photometry for 900 supergiants, Astrophysical Journal Supplement Series, May 1983, 52: 7–22, Bibcode:1983ApJS...52....7F, doi:10.1086/190856

[mnras328_1_45-3] Montes, D.; et al, Late-type members of young stellar kinematic groups - I. Single stars, Monthly Notices of the Royal Astronomical Society, November 2001, 328 (1): 45–63, Bibcode:2001MNRAS.328...45M, arXiv:astro-ph/0106537 , doi:10.1046/j.1365-8711.2001.04781.x

[baas25_1319-4] 4.0 ^4.1 Garrison, R. F., Anchor Points for the MK System of Spectral Classification, Bulletin of the American Astronomical Society, December 1993, 25: 1319 [2012-02-04], Bibcode:1993AAS...183.1710G, （原始内容存档于2019-06-25）

[scfs-5] Wielen, R.; et al, Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, 1999, Bibcode:1999VeARI..35....1W

[kaler-6] 6.0 ^6.1 Kaler, James B., ADHAFERA (Zeta Leonis), Stars (University of Illinois), [2010-05-12], （原始内容存档于2016-11-04）

[aj135_1_209-7] 7.0 ^7.1 ^7.2 ^7.3 ^7.4 ^7.5 ^7.6 Massarotti, Alessandro; et al, Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity, The Astronomical Journal, January 2008, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209

[aj121_4_2159-8] Gray, R. O.; Graham, P. W.; Hoyt, S. R., The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence, The Astronomical Journal, April 2001, 121 (4): 2159–2172, Bibcode:2001AJ....121.2159G, doi:10.1086/319957

[SIMBAD-9] zet Leo -- Variable Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2010-05-12], （原始内容存档于2016-04-02）

[proctor-10] Proctor, Mary, Evenings with the Stars, Popular Astronomy, 1896–7, 4: 565 请检查|date=中的日期值 (帮助)

[VizieR-11] CCDM (Catalog of Components of Double & Multiple stars (Dommanget+ 2002), VizieR (Centre de Données astronomiques de Strasbourg), [2010-05-12], （原始内容存档于2020-08-11）

[Alcyone-12] Adhafera, Alcyone Bright Star Catalogue, [2010-05-12], （原始内容存档于2018-07-02）

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