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 | |
参考数据库 | |
SIMBAD | The system |
A | |
B | |
Furuhjelm 46, 也称为HD 155876或Gliese 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。
参考
- ^ 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).
- ^ 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
- ^ Fractional Besselian year.
- ^ 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
- Diagram of orbit from U.S.Naval Obs. site 互联网档案馆的存档,存档日期2016-03-03.
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