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]。
克卜勒-51的行星系[7][2]
成員 (依恆星距離)
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质量
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半長軸 (AU)
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轨道周期 (天)
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離心率
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傾角
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半径
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b
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7000369000000000000♠3.69+1.86 −1.59 M⊕
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6999251400000000000♠0.2514±0.0097
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7001451542000000000♠45.1542±0.0003
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6998300000000000000♠0.03±0.01
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7001897800000000000♠89.78+0.15 −0.17°
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7000689000000000000♠6.89±0.14 R⊕
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c
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7000443000000000000♠4.43±0.54 M⊕
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6999384000000000000♠0.384±0.015
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7001853139000000000♠85.3139±0.0017
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6998100000000000000♠0.01+0.02 −0.01
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—
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7000898000000000000♠8.98±2.84 R⊕
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d
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7000570000000000000♠5.70±1.12 M⊕
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6999509000000000000♠0.509±0.020
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7002130184500000000♠130.1845±0.0007
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6998100000000000000♠0.01±0.01
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7001899100000000000♠89.91+0.06 −0.08°
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7000946000000000000♠9.46±0.16 R⊕
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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]。
- ^ 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 . (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
- ^ KOI-620. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 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.