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**屏一 (天兔座μ)**
	屏一 (天兔座μ) 的位置 (紅圈)。
觀測資料; 曆元 J2000.0
星座	天兔座
星官	屏 (参宿)
赤經	05h 12m 55.90168s
赤緯	−16° 12′ 19.6885″
視星等（V）	3.259
特性
光谱分类	B9 IV:HgMn
U−B 色指数	–0.357
B−V 色指数	–0.096
变星类型	Suspected α2 CVn
天体测定
徑向速度 (Rv)	+27.7 km/s
自行 (μ)	赤经：+47.09 mas/yr ; 赤纬：–16.39 mas/yr
视差 (π)	17.54 ± 0.55 mas
距离	186 ± 6 ly ; (57 ± 2 pc)
詳細資料
半徑	3.39 ± 0.16 R☉
表面重力 (log g)	3.85
溫度	12,800 K
金属量 [Fe/H]	–0.05 dex
自轉速度 (v sin i)	16 ± 0.5 km/s
其他命名
	5 Leporis, FK5 1144, HR 1702, HD 33904, BD-16 1072, SAO 150237, HIP 61932.

屏一（μ Lep，天兔座μ）是在南天的星座天兔座內的一顆恆星。它的視星等為3.259^[2]，使這顆在南半球的恆星用裸眼就可以看見。視差測量估計這顆恆星與地球的距離是186光年（57秒差距） ^[1]。

這顆恆星的恆星光譜是B9IV:HgMn^[3]，然而’:’之後顯示的是不確定的光譜數值。亮度分類的IV顯示這是一顆次巨星，是一顆已經耗盡核心的氫燃料，是正在變成巨星的一顆恆星。目前，它的半徑是3.4太陽半徑^[4]，並且外殼的有效溫度是12,800K ^[6]。

屏一被懷疑是周期大約2天的獵犬座α²型變星，然而尚未獲得證實。這顆恆星的光譜顯示有超量的汞和錳，因此在恆星分類上被標示了HgMn^[4]。在距離這顆恆星0.93角秒的地方偵測到X-射線輻射，以屏一到地球的距離估計，這等於52天文單位的投影距離。這個輻射源的來源可能是屏一的伴星：可能是一顆主序星或更小的恆星。此物體的X-射線亮度是(4.4 ± 0.1) × 10 ²⁹ erg s^–1^[8]。

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, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357
^ ^2.0 ^2.1 ^2.2 ^2.3 Gutierrez-Moreno, Adelina; et al. A System of photometric standards 1. Publicaciones Universidad de Chile, Department de Astronomy: 1–17. 1966. Bibcode:1966PDAUC...1....1G.
^ ^3.0 ^3.1 Houk, N.; Smith-Moore, M., Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, Volume 4, Declinations -26°.0 to -12°.0, Ann Arbor, MI: Department of Astronomy, University of Michigan, 1988, Bibcode:1988mcts.book.....H
^ ^4.0 ^4.1 ^4.2 ^4.3 ^4.4 Kochukhov, O.; et al, No magnetic field in the spotted HgMn star μ Leporis, Astronomy & Astrophysics, October 2011, 534: L13, Bibcode:2011A&A...534L..13K, arXiv:1110.0829 , doi:10.1051/0004-6361/201117970
^ Wilson, Ralph Elmer. General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. 1953. Bibcode:1953QB901.W495......
^ ^6.0 ^6.1 ^6.2 ^6.3 Smith, K. C.; Dworetsky, M. M., Elemental Abundances in Normal Late B-Stars and Hgmn-Stars from Co-Added IUE Spectra - Part One - Iron Peak Elements, Astronomy and Astrophysics, July 1993, 274 (2): 335, Bibcode:1993A&A...274..335S
^ mu. Lep -- Variable Star of alpha2 CVn type, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-01-09], （原始内容存档于2020-11-05）
^ Behar, Ehud; et al, Resolving X-Ray Sources from B Stars Spectroscopically: The Example of μ Leporis, The Astrophysical Journal, September 2004, 612 (1): L65–L68, Bibcode:2004ApJ...612L..65B, arXiv:astro-ph/0407338 , doi:10.1086/424485

外部連結

Jim Kaler's Stars, University of Illinois: MU LEP (Mu Leporis) （页面存档备份，存于互联网档案馆）

[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, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357

[sps1966-2] 2.0 ^2.1 ^2.2 ^2.3 Gutierrez-Moreno, Adelina; et al. A System of photometric standards 1. Publicaciones Universidad de Chile, Department de Astronomy: 1–17. 1966. Bibcode:1966PDAUC...1....1G.

[houk_smith_moore1988-3] 3.0 ^3.1 Houk, N.; Smith-Moore, M., Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, Volume 4, Declinations -26°.0 to -12°.0, Ann Arbor, MI: Department of Astronomy, University of Michigan, 1988, Bibcode:1988mcts.book.....H

[aaa534_L13-4] 4.0 ^4.1 ^4.2 ^4.3 ^4.4 Kochukhov, O.; et al, No magnetic field in the spotted HgMn star μ Leporis, Astronomy & Astrophysics, October 2011, 534: L13, Bibcode:2011A&A...534L..13K, arXiv:1110.0829 , doi:10.1051/0004-6361/201117970

[gcsrv-5] Wilson, Ralph Elmer. General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. 1953. Bibcode:1953QB901.W495......

[aaa274_2_335-6] 6.0 ^6.1 ^6.2 ^6.3 Smith, K. C.; Dworetsky, M. M., Elemental Abundances in Normal Late B-Stars and Hgmn-Stars from Co-Added IUE Spectra - Part One - Iron Peak Elements, Astronomy and Astrophysics, July 1993, 274 (2): 335, Bibcode:1993A&A...274..335S

[SIMBAD-7] u. Lep -- Variable Star of alpha2 CVn type, SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-01-09], （原始内容存档于2020-11-05）

[apj612_1_L65-8] Behar, Ehud; et al, Resolving X-Ray Sources from B Stars Spectroscopically: The Example of μ Leporis, The Astrophysical Journal, September 2004, 612 (1): L65–L68, Bibcode:2004ApJ...612L..65B, arXiv:astro-ph/0407338 , doi:10.1086/424485

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屏一

參考資料

外部連結

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