参旗七

参旗七(猎户座π4)是位于猎户座双星系统,其视星等为3.67。

参旗七
参旗七的位置(红圈处)
觀測資料
曆元 J2000.0
星座 猎户座
星官
赤經 04h 51m 12.36472s[1]
赤緯 +05° 36 18.3723[1]
視星等(V) 3.685[2]
特性
光谱分类B2 III[3]
U−B 色指数−0.797[2]
B−V 色指数−0.180[2]
天体测定
徑向速度 (Rv)23.3[4] km/s
自行 (μ) 赤经:−2.21[1] mas/yr
赤纬:+0.85[1] mas/yr
视差 (π)3.10 ± 0.18[1] mas
距离1,050 ± 60 ly
(320 ± 20 pc)
軌道[5]
繞行週期 (P)9.5191 d
偏心率 (e)0.03
近心点 曆元 (T)2418275.65±10.0
近心點幅角 (ω)
(secondary)
165°
半振幅 (K1)
(primary)
25.8 km/s
詳細資料
π4 Ori A
質量10.95±0.97[6] M
半徑9.1[7] R
表面重力 (log g)3.59[8]
亮度19,726[6] L
溫度21,874±126[7] K
金属量 [Fe/H]−0.31[8] dex
自轉速度 (v sin i)38[9] km/s
年齡15.4±1.0[10] Myr
其他命名
π4 Ori, 3 Orionis, BD+05° 745, FK5 179, HD 30836, HIP 22549, HR 1552, SAO 112142.[11]
參考資料庫
SIMBAD资料

参考文献

  1. van Leeuwen, F., , Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752可免费查阅, doi:10.1051/0004-6361:20078357.
  2. Oja, T., , Astronomy and Astrophysics Supplement Series, August 1985, 61: 331–339, Bibcode:1985A&AS...61..331O.
  3. Levato, H., , Astronomy and Astrophysics Supplement Series, January 1975, 19: 91–99, Bibcode:1975A&AS...19...91L.
  4. Wilson, Ralph Elmer, , Washington: Carnegie Institution of Washington, 1953, Bibcode:1953GCRV..C......0W.
  5. Pourbaix, D.; et al, , Astronomy & Astrophysics, 2004, 424 (2): 727, Bibcode:2004A&A...424..727P, arXiv:astro-ph/0406573可免费查阅, doi:10.1051/0004-6361:20041213.
  6. Hohle, M. M.; et al, , Astronomische Nachrichten, April 2010, 331 (4): 349, Bibcode:2010AN....331..349H, arXiv:1003.2335可免费查阅, doi:10.1002/asna.200911355.
  7. Underhill, A. B.; et al, , Monthly Notices of the Royal Astronomical Society, November 1979, 189: 601–605, Bibcode:1979MNRAS.189..601U, doi:10.1093/mnras/189.3.601.
  8. Soubiran, C.; et al, , Astronomy and Astrophysics, June 2010, 515: A111, Bibcode:2010A&A...515A.111S, arXiv:1004.1069可免费查阅, doi:10.1051/0004-6361/201014247.
  9. Simón-Díaz, S.; Herrero, A., , Astronomy & Astrophysics, 2014, 562: A135, Bibcode:2014A&A...562A.135S, arXiv:1311.3360可免费查阅, doi:10.1051/0004-6361/201322758.
  10. Tetzlaff, N.; et al, , Monthly Notices of the Royal Astronomical Society, 2011, 410: 190, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883可免费查阅, doi:10.1111/j.1365-2966.2010.17434.x.
  11. , SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), [2016-11-18], (原始内容存档于2017-05-10).
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