克卜勒-51
觀測資料 曆元 J2000.0 | |
---|---|
星座 | 天鵝座 |
星官 | |
赤經 | 19h 45m 55.1428629445s[1] |
赤緯 | +49° 56′ 15.650520690″[1] |
視星等(V) | |
特性 | |
光谱分类 | G[2] |
天体测定 | |
徑向速度 (Rv) | −4.3[3] km/s |
自行 (μ) | 赤经:±0.020 0.075[1] mas/yr 赤纬:±0.019 −7.451[1] mas/yr |
视差 (π) | 1.2457 ± 0.0165[1] mas |
距离 | 2,620 ± 30 ly (800 ± 10 pc) |
詳細資料 [4][2] | |
質量 | ±0.012 0.985M☉ |
半徑 | ±0.011 0.881R☉ |
表面重力 (log g) | +0.03 −0.04 4.51 |
亮度 | 0.66[5] L☉ |
溫度 | +64 −65 5,662K |
金属量 [Fe/H] | ±0.04 +0.04dex |
自轉速度 (v sin i) | ±1.0 5.5[3] km/s |
年齡 | ±250 500Myr |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
克卜勒-51是一顆大約有5億年的歷史的類太陽恆星[2]。它有三顆超級蓬鬆行星:克卜勒-51b、c和d環繞著運行,這三顆行星是所有已知的系外行星中密度最低的。這些行星的半徑與木星等氣態巨行星相似,但就其大小而言,質量異常小,僅比地球大幾倍[2]。
行星系
成員 (以距離排序) |
質量 | 半長軸 (AU) |
軌道週期 (地球日) |
離心率 | 傾角 | 半徑 |
---|---|---|---|---|---|---|
b | +1.86 −1.59 3.69M⊕ |
±0.0097 0.2514 | ±0.0003 45.1542 | ±0.01 0.03 | +0.15 −0.17 89.78° |
±0.14 6.89R⊕ |
c | ±0.54 4.43M⊕ | ±0.015 0.384 | ±0.0017 85.3139 | +0.02 −0.01 0.01 |
— | ±2.84 8.98R⊕ |
d | ±1.12 5.70M⊕ | ±0.020 0.509 | ±0.0007 130.1845 | ±0.01 0.01 | +0.06 −0.08 89.91° |
±0.16 9.46R⊕ |
![](http://images.weserv.nl/?url=//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Kepler_51_planets_compared_to_some_of_the_planets_in_our_Solar_system.png/220px-Kepler_51_planets_compared_to_some_of_the_planets_in_our_Solar_system.png)
克卜勒-51有三顆行星,都是超級蓬鬆行星。克卜勒-51b、c和d的密度是所有系外行星中已知的最低的[2]。
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533
. doi:10.1051/0004-6361/202039657
. 已忽略未知参数
|collaboration=
(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 2.0 2.1 2.2 2.3 2.4 2.5 Libby-Roberts, Jessica E.; et al. The Featureless Transmission Spectra of Two Super-puff Planets. The Astronomical Journal. 2020, 159 (2): 57. Bibcode:2020AJ....159...57L. S2CID 204950000. arXiv:1910.12988
. doi:10.3847/1538-3881/ab5d36
.
- ^ 3.0 3.1 Petigura, Erik A.; et al. The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets. The Astronomical Journal. September 2017, 154 (3): 20. Bibcode:2017AJ....154..107P. S2CID 55183141. arXiv:1703.10400
. doi:10.3847/1538-3881/aa80de
. 107.
- ^ Johnson, John Asher; et al. The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars. The Astronomical Journal. September 2017, 154 (3): 9. Bibcode:2017AJ....154..108J. S2CID 119241581. arXiv:1703.10402
. doi:10.3847/1538-3881/aa80e7
. 108.
- ^ Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365
. doi:10.1051/0004-6361/201833051. VizieR中此天体在盖亚望远镜第二批数据发布的记录
- ^ [ 请检查
|url=
值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. KOI-620] - ^ Masuda, Kento. Very Low Density Planets Around Kepler-51 Revealed with Transit Timing Variations and an Anomaly Similar to a Planet-Planet Eclipse Event. The Astrophysical Journal. 2014, 783 (1): 53. Bibcode:2014ApJ...783...53M. S2CID 119106865. arXiv:1401.2885
. doi:10.1088/0004-637X/783/1/53.
進階讀物
- Kepler-51 is Home to Three Super-Puff Exoplanets (页面存档备份,存于互联网档案馆), Sci-News, Dec 20, 2019 by Natali Anderson