Furuhjelm 46

Furuhjelm 46, 也稱為HD 155876Gliese 661, 是位於武仙座附近的雙星系統,由兩顆非常相似的紅矮星組成。

Furuhjelm 46
觀測資料
曆元 J2000
星座 武仙座
星官
赤經 17h 12m 07.91s
赤緯 +45° 39′ 57.2″
視星等(V) 10.02/10.25
特性
光谱分类M3 + M3.5
天体测定
徑向速度 (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)
軌道[2]
繞行週期 (P)12.9512 ± 0.0096 yr
半長軸 (a)0.7620 ± 0.0015"
偏心率 (e)0.7430 ± 0.008
倾斜角 (i)149.14 ± 0.25°
升交点黃經 (Ω)160.0 ± 1.3°
近心点 曆元 (T)1991.032 ± 0.011[3]
近心點幅角 (ω)
(secondary)
99.0 ± 1.0°
詳細資料
溫度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
參考資料庫
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

參考

  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). 

外部連結