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**柱一 (角宿) (半人馬座υ¹)**
觀測資料; 曆元 J2000.0
星座	半人馬座
星官	柱 (角宿)
赤經	13h 58m 40.75s
赤緯	−44° 48′ 12.9″
視星等（V）	+3.87
特性
光谱分类	B2 IV/V
B−V 色指数	−0.208±0.011
天体测定
徑向速度 (Rv)	+9.2±1.4 km/s
自行 (μ)	赤经：−27.51±0.15 mas/yr ; 赤纬：−22.44±0.13 mas/yr
视差 (π)	7.63 ± 0.16 mas
距离	427 ± 9 ly ; (131 ± 3 pc)
绝对星等 (MV)	−1.72
詳細資料
質量	7.9±0.1 M☉
半徑	3.74±0.34 R☉
表面重力 (log g)	4.15±0.07
亮度	1,884 L☉
溫度	21,411±377 K
自轉速度 (v sin i)	124 km/s
年齡	13.0±2.0 Myr
其他命名
	υ1 Cen、CD−44° 9010、FK5 3112、HD 121790、HIP 68282、HR 5249、SAO 224585
參考資料庫
SIMBAD	资料

柱一(半人馬座υ¹) 是位於南半球星座半人馬座的一顆恆星^[8]，意思是支撐庫樓的第一根柱子^[9]。它呈現藍白色的色調，視星等 +3.87，是肉眼可見的恆星^[2]。根據視差的測量，它與地球的距離約為427光年^[1]，並且以 +9km/s 的徑向速度退行^[4]。它是天蠍-半人馬星協的下半人馬-南十字的成員^[2]。

它的恆星分類是B2IV/V^[2]，這與大質量的B型恆星和光度分類是主序星和次巨星混和特徵的恆星。它的年齡是1,300萬^[5]，投影旋轉速度為124km/s^[4]。這顆恆星的質量是太陽的7.9倍^[5]，半徑是太陽的3.7倍^[6]。它的輻射量是太陽輻射的1,884倍^[2]，是由它的光球有效溫度21,411K導出的^[6]。

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, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357. Vizier catalog entry （页面存档备份，存于互联网档案馆）
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.
^ Hiltner, W. A.; et al, MK Spectral Types for Bright Southern OB Stars, Astrophysical Journal, July 1969, 157: 313–326, Bibcode:1969ApJ...157..313H, doi:10.1086/150069.
^ ^4.0 ^4.1 ^4.2 ^4.3 Jilinski, E.; et al, Radial velocity measurements of B stars in the Scorpius-Centaurus association, Astronomy and Astrophysics, March 2006, 448 (3): 1001–1006, Bibcode:2006A&A...448.1001J, S2CID 17818058, arXiv:astro-ph/0601643 , doi:10.1051/0004-6361:20041614.
^ ^5.0 ^5.1 ^5.2 ^5.3 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.
^ ^6.0 ^6.1 ^6.2 ^6.3 ^6.4 Fitzpatrick, E. L.; Massa, D., Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry, The Astronomical Journal, March 2005, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, S2CID 119512018, arXiv:astro-ph/0412542 , doi:10.1086/427855.
^ ups01 Oph. SIMBAD. 斯特拉斯堡天文資料中心.
^ Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, 2008, 389 (2): 869, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
^ （中文） AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 25 日（页面存档备份，存于互联网档案馆）

[van_Leeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357. Vizier catalog entry （页面存档备份，存于互联网档案馆）

[Anderson2012-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.

[Hiltner1969-3] Hiltner, W. A.; et al, MK Spectral Types for Bright Southern OB Stars, Astrophysical Journal, July 1969, 157: 313–326, Bibcode:1969ApJ...157..313H, doi:10.1086/150069.

[Jilinski2006-4] 4.0 ^4.1 ^4.2 ^4.3 Jilinski, E.; et al, Radial velocity measurements of B stars in the Scorpius-Centaurus association, Astronomy and Astrophysics, March 2006, 448 (3): 1001–1006, Bibcode:2006A&A...448.1001J, S2CID 17818058, arXiv:astro-ph/0601643 , doi:10.1051/0004-6361:20041614.

[Tetzlaff2011-5] 5.0 ^5.1 ^5.2 ^5.3 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.

[aj129_3_1642-6] 6.0 ^6.1 ^6.2 ^6.3 ^6.4 Fitzpatrick, E. L.; Massa, D., Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry, The Astronomical Journal, March 2005, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, S2CID 119512018, arXiv:astro-ph/0412542 , doi:10.1086/427855.

[SIMBAD-7] ups01 Oph. SIMBAD. 斯特拉斯堡天文資料中心.

[Eggleton2008-8] Eggleton, P. P.; Tokovinin, A. A., A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society, 2008, 389 (2): 869, Bibcode:2008MNRAS.389..869E, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.

[9] （中文） AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 25 日（页面存档备份，存于互联网档案馆）

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柱一 (角宿)

參考資料