Kepler-20d

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Kepler-20d
Discovery
Discovered by Kepler team
Discovery date20 December 2011
Transit (Kepler Mission)
Orbital characteristics [1]
0.3474 ± 0.0067 AU (51,970,000 ± 1,000,000 km)
Eccentricity <0.082
77.611455(96)  d
Inclination 89.708°+0.17°
−0.053°
Star Kepler-20 (KOI-070)
Physical characteristics [1]
2.606+0.053
−0.039 R🜨
Mass 13.4+3.7
−3.6 M🜨
Mean density
4.1+1.1
−1.2  g⋅cm−3
Temperature 430±6  K (157 °C; 314 °F, equilibrium)

    Kepler-20d is an exoplanet orbiting Kepler-20. It has a mass and radius similar to Neptune. Despite being the furthest planet from the star, it has an orbit similar to Mercury, meaning that it is a hot Neptune. Along with the other four planets in the system, Kepler-20d was announced on December 20, 2011.

    References

    1. 1 2 Bonomo, A. S.; Dumusque, X.; et al. (September 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities. No excess of cold Jupiters in small planet systems". Astronomy & Astrophysics . 677: A33. arXiv: 2304.05773 . Bibcode:2023A&A...677A..33B. doi:10.1051/0004-6361/202346211. S2CID   258078829.

    Kepler-20d | Wayback Machine


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