壘壁陣三

垒壁阵三γ Cap / 摩羯座γ)是摩羯座的巨星。其俗名Nashira来自阿拉伯语نشرة ,意为“捷报者”。由于靠近黄道,垒壁阵三可能被月亮和行星(很少)遮挡。垒壁阵三是蓝-白A型(A7III)巨星,标准视亮度为+3.69,离地球大约139光年。它是猎犬座α²变星,亮度变化0.03星等。

壘壁陣三

Gamma Capricorni is at left center.
觀測資料
曆元 J2000.0
星座 摩羯座
星官 室宿 垒壁阵
赤經 21h 40m 05.4563s[1]
赤緯 −16° 39′ 44.308″[1]
視星等(V) +3.69
特性
光谱分类F0p[2]
U−B 色指数+0.22[3]
B−V 色指数+0.32[3]
天体测定
徑向速度 (Rv)−31.2[4] km/s
自行 (μ) 赤经:187.39[1] mas/yr
赤纬:−22.33[1] mas/yr
视差 (π)23.48 ± 1.10[1] mas
距离139 ± 7 ly
(43 ± 2 pc)
詳細資料
表面重力 (log g)3.95[5]
溫度7,520[5] K
金屬量[5]
自轉速度 (v sin i)40[6] km/s
其他命名
Nashira, 40 Capricorni, HR 8278, HD 206088, NN 4209, BD−17°6340, FK5 812, HIP 106985, SAO 164560.[2]


参考文献

  1. ^ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C.; et al. The HIPPARCOS Catalogue. Astronomy & Astrophysics. July 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ 2.0 2.1 HD 206088 -- Variable Star of alpha2 CVn type. SIMBAD. Centre de Données astronomiques de Strasbourg. [2009-11-12]. (原始内容存档于2016-08-05). 
  3. ^ 3.0 3.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J. 
  4. ^ Wilson, Ralph Elmer. General catalogue of stellar radial velocities. Carnegie Institution of Washington. 1953 [2007-05-14]. (原始内容存档于2018-10-05). 
  5. ^ 5.0 5.1 5.2 Burkhart, C.; Coupry, M. F. The A and Am-Fm stars. I - The abundances of Li, Al, Si, and Fe. Astronomy and Astrophysics. September 1991, 249 (1): 205−216. Bibcode:1991A&A...249..205B. 
  6. ^ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i. Astronomy and Astrophysics. October 2002, 393: 897–911. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943.