厕四

厕四(天兔座δ)是位于天兔座的恒星，其视星等为3.85，距地球114光年。

厕四

观测资料 历元 J2000.0
星座	天兔座
星官
赤经	05h 51m 19.29613s[1]
赤纬	−20° 52′ 44.7232″[1]
视星等（V）	3.85[2]
特性
光谱分类	K1 IV Fe−0.5[3] or K0 IIIb Fe−1.5 CH0.5[4]
U−B 色指数	+0.71[2]
B−V 色指数	+0.98[2]
天体测定
径向速度 (Rv)	+100.20[5] km/s
自行 (μ)	赤经：+229.49[1] mas/yr 赤纬：−648.41[1] mas/yr
视差 (π)	28.68 ± 0.17[1] mas
距离	113.7 ± 0.7 ly (34.9 ± 0.2 pc)
绝对星等 (MV)	+1.04[6]
详细资料
质量	0.94[6] M☉
半径	10[7] R☉
表面重力 (log g)	7000246000000000000♠2.46±0.23[8]
亮度	45.7[6] L☉
温度	7003466000000000000♠4,660±84[8] K
金属量 [Fe/H]	3000260000000000000♠−0.74±0.09[8] dex
自转速度 (v sin i)	0[9] km/s
年龄	10.7[6] Gyr
其他命名
Lep、​15 Lep、​BD−20° 1211、​FK5 222、​GC 7362、​HD 39364、​HIP 27654、​HR 2035、​SAO 170926、​LHS 1792[10]
参考数据库
SIMBAD	资料

参考文献

1. 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. Ducati, J. R., VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system, CDS/ADC Collection of Electronic Catalogues, 2002, 2237, Bibcode:2002yCat.2237....0D.
3. Gray, R. O.; et al, Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample, The Astronomical Journal, July 2006, 132 (1): 161–170, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770 , doi:10.1086/504637.
4. Keenan, Philip C.; McNeil, Raymond C., The Perkins catalog of revised MK types for the cooler stars, Astrophysical Journal Supplement Series, 1989, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
5. Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35 495 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.
6. Takeda, Yoichi; et al, Stellar Parameters and Elemental Abundances of Late-G Giants, Publications of the Astronomical Society of Japan, August 2008, 60 (4): 781–802, Bibcode:2008PASJ...60..781T, arXiv:0805.2434 , doi:10.1093/pasj/60.4.781.
7. Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3rd, Birkhäuser, 2006 [2018-02-25], ISBN 3-540-29692-1, （原始内容存档于2019-05-20）. The radius (R_*) is given by:

   ${\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(34.9\cdot 2.63\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 19.7\cdot R_{\bigodot }\end{aligned}}}$

8. Sharma, Kaushal; et al, New atmospheric parameters and spectral interpolator for the MILES cool stars, Astronomy & Astrophysics, 2016, 585: 27, Bibcode:2016A&A...585A..64S, arXiv:1512.04882 , doi:10.1051/0004-6361/201526111, A64.
9. Uesugi, Akira; Fukuda, Ichiro, Catalogue of rotational velocities of the stars, Contributions from the Institute of Astrophysics and Kwasan Observatory (University of Kyoto), 1970, Bibcode:1970crvs.book.....U.
10. del Lep. SIMBAD. 斯特拉斯堡天文资料中心. [2017-08-18].