厕四

厕四
觀測資料; 曆元 J2000.0
星座	天兔座
星官
赤經	05h 51m 19.29613s
赤緯	−20° 52′ 44.7232″
視星等（V）	3.85
特性
光谱分类	K1 IV Fe−0.5 or K0 IIIb Fe−1.5 CH0.5
U−B 色指数	+0.71
B−V 色指数	+0.98
天体测定
徑向速度 (Rv)	+100.20 km/s
自行 (μ)	赤经：+229.49 mas/yr ; 赤纬：−648.41 mas/yr
视差 (π)	28.68 ± 0.17 mas
距离	113.7 ± 0.7 ly ; (34.9 ± 0.2 pc)
绝对星等 (MV)	+1.04
詳細資料
質量	0.94 M☉
半徑	10 R☉
表面重力 (log g)	2.46±0.23
亮度	45.7 L☉
溫度	4,660±84 K
金属量 [Fe/H]	−0.74±0.09 dex
自轉速度 (v sin i)	0 km/s
年齡	10.7 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
參考資料庫
SIMBAD	资料

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。

参考文献[编辑]

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 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.
^ ^2.0 ^2.1 ^2.2 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.
^ 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.
^ 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.
^ 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.
^ ^6.0 ^6.1 ^6.2 ^6.3 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.
^ 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:
${\begin{aligned}2\cdot R_{*}&={\frac {(34.9\cdot 2.63\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 19.7\cdot R_{\bigodot }\end{aligned}}$
^ ^8.0 ^8.1 ^8.2 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.
^ 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.
^ [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=del+Lep
del Lep] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-18].

[vanLeeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 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.

[Ducati2002-2] 2.0 ^2.1 ^2.2 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.

[Gray2006-3] 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.

[Perkins1989-4] 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.

[Gontcharov2006-5] 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.

[Takeda2008-6] 6.0 ^6.1 ^6.2 ^6.3 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.

[lang2006-7] 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:
${\begin{aligned}2\cdot R_{*}&={\frac {(34.9\cdot 2.63\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 19.7\cdot R_{\bigodot }\end{aligned}}$

[sharma2016-8] 8.0 ^8.1 ^8.2 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.

[uesugi_fukuda70-9] 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.

[SIMBAD-10] [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=del+Lep
del Lep] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-18].

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觀測資料曆元 J2000.0
星座	天兔座
星官
赤經	05^h 51^m 19.29613^s^[1]
赤緯	−20° 52′ 44.7232″^[1]
視星等（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

徑向速度 (R_v)	+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 (M_V)	+1.04^[6]

詳細資料

質量	0.94^[6] M_☉
半徑	10^[7] R_☉
表面重力 (log g)	7000246000000000000♠2.46±0.23^[8]
亮度	45.7^[6] L_☉
溫度	7003466000000000000♠4,660±84^[8] K
金属量 [Fe/H]	3000260000000000000♠−0.74±0.09^[8] dex
自轉速度 (v sin i)	0^[9] km/s
年齡	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]
參考資料庫
SIMBAD	资料