廁四
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 天兔座 |
| 星官 | |
| 赤經 | 05h 51m 19.29613s[1] |
| 赤緯 | −20° 52′ 44.7232″[1] |
| 視星等（V） | 3.85[2] |
| 特性 | |
| 光譜分類 | K1 IV Fe−0.5[3] or K0 IIIb Fe−1.5 CH0.5[4] |
| U−B 色指數 | +0.71[2] |
| B−V 色指數 | +0.98[2] |
| 天體測定 | |
| 徑向速度 (Rv) | +100.20[5] km/s |
| 自行 (μ) | 赤經：+229.49[1] mas/yr 赤緯：−648.41[1] mas/yr |
| 視差 (π) | 28.68 ± 0.17[1] mas |
| 距離 | 113.7 ± 0.7 ly (34.9 ± 0.2 pc) |
| 絕對星等 (MV) | +1.04[6] |
| 詳細資料 | |
| 質量 | 0.94[6] M☉ |
| 半徑 | 10[7] R☉ |
| 表面重力 (log g) | 2.46±0.23[8] |
| 亮度 | 45.7[6] L☉ |
| 溫度 | 4,660±84[8] K |
| 金屬量 [Fe/H] | −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 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
廁四(天兔座δ)是位於天兔座的恆星，其視星等為3.85，距地球114光年。
參考文獻
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, 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, （原始內容存檔於2019-05-20）. The radius (R*) is given by:
- ^ 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.
- ^ del Lep. SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-18].
