天园十

天园十（波江座υ4）是位于波江座的双星系统，其视星等为3.56^[2]。

天园十

觀測資料 曆元 J2000.0
星座	波江座
星官
赤經	04h 17m 53.66241s[1]
赤緯	−33° 47′ 54.0569″[1]
視星等（V）	3.56[2]
特性
光谱分类	B8V + B9.5V[3]
U−B 色指数	−0.36[2]
B−V 色指数	−0.12[2]
天体测定
徑向速度 (Rv)	+17.6[4] km/s
自行 (μ)	赤经：+62.52[1] mas/yr 赤纬：−7.24[1] mas/yr
视差 (π)	18.33 ± 0.15[1] mas
距离	178 ± 1 ly (54.6 ± 0.4 pc)
绝对星等 (MV)	−0.20[5]
軌道[6]
繞行週期 (P)	7005432892080000000♠5.0103250±0.0000008 d
半長軸 (a)	6991922115621470339♠1.902±0.006 mas
偏心率 (e)	0
倾斜角 (i)	7002146200000000000♠146.2±0.1°
近心点 曆元 (T)	2454407.7214 ± 0.002 JD
半振幅 (K1) (primary)	7001626800000000000♠62.68±0.17[7] km/s
半振幅 (K2) (secondary)	7001647000000000000♠64.70±0.15[7] km/s
詳細資料 [6]
υ4 Eri A
質量	7000317000000000000♠3.17±0.07 M☉
半徑	7000231999999999999♠2.32±0.18 R☉
表面重力 (log g)	7000421000000000000♠4.21±0.07
亮度	7002100600000000000♠100.6±4.3 L☉
溫度	7004129300000000000♠12,930±440[8] K
自轉速度 (v sin i)	19[8] km/s
年齡	146[8] Myr
υ4 Eri B
質量	7000307000000000000♠3.07±0.07 M☉
半徑	7000231999999999999♠2.32±0.18 R☉
表面重力 (log g)	7000421000000000000♠4.21±0.07
亮度	7001874000000000000♠87.4±3.3 L☉
溫度	12,250 K
其他命名
υ4 Eri, 41 Eridani, CD−34° 1614, HD 27376, HIP 20042, HR 1347, SAO 194902.[9]
參考資料庫
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. Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV data (SIMBAD), 1986, Bibcode:1986EgUBV........0M.
3. 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, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
4. Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, The Revision of the General Catalogue of Radial Velocities, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (University of Toronto: International Astronomical Union), June 20–24, 1966, Bibcode:1967IAUS...30...57E.
5. Hubrig, S.; et al, Search for low-mass PMS companions around X-ray selected late B stars, Astronomy and Astrophysics, June 2001, 372: 152−164, Bibcode:2001A&A...372..152H, arXiv:astro-ph/0103201 , doi:10.1051/0004-6361:20010452.
6. Hummel, Christian A.; et al, The orbit of the mercury-manganese binary 41 Eridani, Astronomy & Astrophysics, March 2017, 600 (L5): 6, Bibcode:2016SPIE.9907E..0QH, arXiv:1703.07668 , doi:10.1117/12.2231859.
7. Hubrig, S.; et al, Magnetic fields of HgMn stars, Astronomy & Astrophysics, November 2012, 547: 24, Bibcode:2012A&A...547A..90H, arXiv:1208.2910 , doi:10.1051/0004-6361/201219778, A90.
8. David, Trevor J.; Hillenbrand, Lynne A., The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets, The Astrophysical Journal, 2015, 804 (2): 146, Bibcode:2015ApJ...804..146D, arXiv:1501.03154 , doi:10.1088/0004-637X/804/2/146.
9. * ups04 Eri -- Spectroscopic binary. SIMBAD. 斯特拉斯堡天文資料中心. [2016-10-13].