格利泽892
觀測資料 曆元 J2000.0 | |
---|---|
星座 | 仙后座[1][2] |
星官 | |
赤經 | 23h 13m 17s[1][2] |
赤緯 | +57° 10′ 6″[1][2] |
視星等(V) | 5.56[1][2] |
特性 | |
光谱分类 | K3V[1][2] |
U−B 色指数 | 0.89[1][2] |
B−V 色指数 | 1.01[1][2] |
R−I 色指数 | 0.53[1][2] |
天体测定 | |
徑向速度 (Rv) | 0.89 km/s |
自行 (μ) | 赤经:-18 mas/yr 赤纬:- mas/yr |
视差 (π) | 0.152 mas |
距离 | 21.35 ± 0.04 ly (6.55 ± 0.01 pc) |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
HD 219134,又名BD+56 2966,SAO 35236、HR 8832,是一颗位於仙后座的恒星[1][2],视星等为5.56,位于銀經109.87,銀緯-3.19,其B1900.0坐标为赤經23h 8m 27.8s,赤緯+56° -3.19′ 58″。
已知該恆星擁有7顆行星(b、c、d、f、g、h已證實,e尚未確認)。
行星系統
一個由六顆已知系外行星組成的系統。最裡面的行星HD 219134 b是一顆超級地球,體積是地球的 1.6 倍和密度為每立方厘米6.4克。[3][4]
成員 (依恆星距離) | 质量 | 半長軸 (AU) | 轨道周期 (天) | 離心率 | 傾角 | 半径 |
---|---|---|---|---|---|---|
b | 7000474000000000000♠4.74±0.19 M⊕ | 6998387600000000000♠0.03876±0.00047 | 7000309292600000000♠3.092926±0.000010 | 0 (fixed) | 7001850500000000000♠85.05±0.09° | 7000160200000000000♠1.602±0.055 R⊕ |
c | 7000436000000000000♠4.36±0.22 M⊕ | 6998653000000000000♠0.06530±0.00080 | 7000676458000000000♠6.76458±0.00033 | 6998620000000000000♠0.062±0.039 | 7001872800000000000♠87.28±0.10° | 7000151100000000000♠1.511±0.047 R⊕ |
f | >7000730000000000000♠7.30±0.40 M⊕ | 6999146300000000000♠0.1463±0.0018 | 7001227170000000000♠22.717±0.015 | 6999148000000000000♠0.148±0.047 | — | — |
d | >7001161700000000000♠16.17±0.64 M⊕ | 6999237000000000000♠0.2370±0.0030 | 7001468590000000000♠46.859±0.028 | 6999138000000000000♠0.138±0.025 | — | — |
g | >7001110000000000000♠11±1 M⊕ | 6999375300000000000♠0.3753±0.0004 | 7001942000000000000♠94.2±0.2 | 0 | — | — |
e (未确认) | >7001709000000000000♠70.9±31.45 M⊕ | 7000256000000000000♠2.56±1.6 | 7003184200000000000♠1842±2290 | 6999340000000000000♠0.34±0.17 | ||
h[8] | >98 M⊕ | 7000311000000000000♠3.11±0.04 | 7003210060000000000♠2100.6±2.9 | 6998600000000000000♠0.06±0.04 | — | — |
参考文献
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. (原始内容存档于2019-05-19).
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05).
- ^ PIA19832: Location of Nearest Rocky Exoplanet Known. NASA. 30 July 2015 [30 July 2015]. (原始内容存档于2019-06-26).
- ^ Chou, Felicia; Clavin, Whitney. NASA's Spitzer Confirms Closest Rocky Exoplanet. NASA. 30 July 2015 [31 July 2015]. (原始内容存档于2017-05-17).
- ^ Vogt, Steven S.; et al. Six Planets Orbiting HD 219134. The Astrophysical Journal. November 2015, 814 (1): 12. Bibcode:2015ApJ...814...12V. S2CID 45438051. arXiv:1509.07912
. doi:10.1088/0004-637X/814/1/12.
- ^ Johnson, Marshall C.; et al. A 12-year Activity Cycle for the Nearby Planet Host Star HD 219134. The Astrophysical Journal. April 2016, 821 (2): 74. Bibcode:2016ApJ...821...74J. S2CID 118651905. arXiv:1602.05200
. doi:10.3847/0004-637X/821/2/74.
- ^ Gillon, Michaël; et al. Two massive rocky planets transiting a K-dwarf 6.5 parsecs away. Nature Astronomy. 2017, 1 (3). 0056. Bibcode:2017NatAs...1E..56G. S2CID 56075932. arXiv:1703.01430
. doi:10.1038/s41550-017-0056.
- ^ Van Zandt, Judah; et al, TESS-Keck Survey. XIV. Two Giant Exoplanets from the Distant Giants Survey, The Astronomical Journal, 2023, 165 (2): 60, S2CID 252280288, arXiv:2209.06958
, doi:10.3847/1538-3881/aca6ef
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