Furuhjelm 46, 也称为HD 155876Gliese 661, 是位于武仙座附近的双星系统,由两颗非常相似的红矮星组成。

Furuhjelm 46
观测资料
历元 J2000
星座 武仙座
星官
赤经 17h 12m 07.91s
赤纬 +45° 39′ 57.2″
视星等(V) 10.02/10.25
特性
光谱分类M3 + M3.5
天体测定
径向速度 (Rv)–19 ± 5 km/s
自行 (μ) 赤经:+348.59 ± 5.68 mas/yr
赤纬:–1624.84 ± 6.80 mas/yr
视差 (π)156.66 ± 1.37[1] mas
距离20.8 ± 0.2 ly
(6.38 ± 0.06 pc)
轨道[2]
绕行周期 (P)12.9512 ± 0.0096 yr
半长轴 (a)0.7620 ± 0.0015"
偏心率 (e)0.7430 ± 0.008
倾斜角 (i)149.14 ± 0.25°
升交点黄经 (Ω)160.0 ± 1.3°
近心点 历元 (T)1991.032 ± 0.011[3]
近心点幅角 (ω)
(secondary)
99.0 ± 1.0°
详细资料
温度3,272 ± 28[4] K
金属量 [Fe/H]–0.31 ± 0.17[4] dex
其他命名
BD+45° 2505, HD 155876, HIP 84140, WDS 17121+5450, KUI 79
参考数据库
SIMBADThe system
A
B
Furuhjelm 46 is located in the constellation Hercules
Furuhjelm 46 is located in the constellation Hercules
Furuhjelm 46
Furuhjelm 46在武仙座的位置

参考

编辑
  1. ^ Söderhjelm, Staffan. HIP 84140. Visual binary orbits and masses post Hipparcos. 1999 [2023-03-22]. (原始内容存档于2020-09-25). 
  2. ^ From the Sixth Catalog of Orbits of Visual Binary Stars, based upon Hartkopf, W. I.; Mason, B. D.; McAlister, H. A., Binary star orbits from speckle interferometry. VIII. Orbits of 37 close visual systems, Astronomical Journal, 1996, 111: 370–392, Bibcode:1996AJ....111..370H, doi:10.1086/117790 
  3. ^ Fractional Besselian year.
  4. ^ 4.0 4.1 Rojas-Ayala, Bárbara; et al. Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs (PDF). The Astrophysical Journal. April 2012, 748 (2): 93 [2023-03-22]. Bibcode:2012ApJ...748...93R. S2CID 41902340. arXiv:1112.4567 . doi:10.1088/0004-637X/748/2/93. (原始内容存档 (PDF)于2021-01-29). 

外部链接

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