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**軍井三（Lambda Leporis）**
觀測資料; 曆元 J2000.0
星座	天兔座
星官	軍井 (星官)（參宿）
赤經	05h 19m 34.52405s
赤緯	−13° 10′ 36.4408″
視星等（V）	+4.286±0.005
特性
光谱分类	B0.5 V
U−B 色指数	−1.010±0.005
B−V 色指数	−0.273±0.015
天体测定
徑向速度 (Rv)	+20.2±2.7 km/s
自行 (μ)	赤经：−3.30 mas/yr ; 赤纬：−4.91 mas/yr
视差 (π)	3.83 ± 0.24 mas
距离	850 ± 50 ly ; (260 ± 20 pc)
绝对星等 (MV)	−2.77±0.15
詳細資料
質量	15.0±3.5 M☉
半徑	4.5±0.3 R☉
表面重力 (log g)	4.30±0.05
亮度	15,488 L☉
溫度	30,400±300 K
金属量 [Fe/H]	−0.15 dex
自轉速度 (v sin i)	30±1 km/s
年齡	8±2 Myr
其他命名
	λ Lep、6 Lep、BD−13° 1127、HD 34816、HIP 24845、HR 1756、SAO 150340
參考資料庫
SIMBAD	资料

軍井三（英語：Lambda Leporis）拉丁化的名字來自λ Leporis，是一顆單獨的恆星^[6]。這顆藍白色的恆星位於南天星座天兔座，視星等 +4.29，肉眼直接就能看見^[2]。基於3.83mas的年度視差^[1]，估計它與太陽的距離約為850光年。相對於它的鄰居，這顆恆星的本動速度為7004163000000000000♠16.3±2.8 km/s^[3]。它是獵戶座OB1星協（Ori OB1）的成員^[7]，並且已被確認為高速速逃星 ^[8]。

這是一顆大質量的B型主序星，校正後的恆星分類為B0.5V。估計它的年齡為800萬年^[4]，以30公里/秒的投影旋轉速度旋轉^[2]。這顆恆星的質量大約是太陽質量的15倍，半徑是太陽半徑的4.5倍。在表面30,400 K的有效溫度下，它從光球輻射出的輻射量是太陽光度的15,488倍^[2]。

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.
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 ^2.8 Nieva, M.-F., Temperature, gravity, and bolometric correction scales for non-supergiant OB stars, Astronomy & Astrophysics, February 2013, 550: A26, Bibcode:2013A&A...550A..26N, S2CID 119275940, arXiv:1212.0928 , doi:10.1051/0004-6361/201219677.
^ ^3.0 ^3.1 Bobylev, V. V.; Bajkova, A. T., Galactic kinematics from a sample of young massive stars, Astronomy Letters, August 2013, 39 (8): 532–549, Bibcode:2013AstL...39..532B, S2CID 118568203, arXiv:1307.1677 , doi:10.1134/S106377371308001X.
^ ^4.0 ^4.1 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, January 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.
^ lam Lep. SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-16].
^ 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, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
^ Alexeeva, Sofya; et al, Neon Abundances of B Stars in the Solar Neighborhood, The Astrophysical Journal, June 2020, 896 (1): 59, Bibcode:2020ApJ...896...59A, S2CID 218862999, arXiv:2005.11027 , doi:10.3847/1538-4357/ab9306 , 59.
^ Proffitt, Charles R.; Quigley, Mark F., Boron Abundances in Early B Stars: Results from the B III Resonance Line in IUE Data, The Astrophysical Journal, February 2001, 548 (1): 429–438, Bibcode:2001ApJ...548..429P, doi:10.1086/318673 .

[vanLeeuwen2007-1] 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.

[Nieva2013-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 ^2.7 ^2.8 Nieva, M.-F., Temperature, gravity, and bolometric correction scales for non-supergiant OB stars, Astronomy & Astrophysics, February 2013, 550: A26, Bibcode:2013A&A...550A..26N, S2CID 119275940, arXiv:1212.0928 , doi:10.1051/0004-6361/201219677.

[Bobylev2013-3] 3.0 ^3.1 Bobylev, V. V.; Bajkova, A. T., Galactic kinematics from a sample of young massive stars, Astronomy Letters, August 2013, 39 (8): 532–549, Bibcode:2013AstL...39..532B, S2CID 118568203, arXiv:1307.1677 , doi:10.1134/S106377371308001X.

[Tetzlaff2011-4] 4.0 ^4.1 Tetzlaff, N.; et al, A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society, January 2011, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, S2CID 118629873, arXiv:1007.4883 , doi:10.1111/j.1365-2966.2010.17434.x.

[SIMBAD-5] Lep. SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-16].

[Eggleton2008-6] 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, S2CID 14878976, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.

[Alexeeva2020-7] Alexeeva, Sofya; et al, Neon Abundances of B Stars in the Solar Neighborhood, The Astrophysical Journal, June 2020, 896 (1): 59, Bibcode:2020ApJ...896...59A, S2CID 218862999, arXiv:2005.11027 , doi:10.3847/1538-4357/ab9306 , 59.

[Proffitt2001-8] Proffitt, Charles R.; Quigley, Mark F., Boron Abundances in Early B Stars: Results from the B III Resonance Line in IUE Data, The Astrophysical Journal, February 2001, 548 (1): 429–438, Bibcode:2001ApJ...548..429P, doi:10.1086/318673 .

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軍井三

參考資料

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