Astronomy:Kepler-20c
From HandWiki
| Discovery | |
|---|---|
| Discovered by | Kepler team |
| Discovery date | 20 December 2011 |
| Transit (Kepler Mission) | |
| Orbital characteristics[1] | |
| 0.0936 ± 0.0018 AU (14,000,000 ± 270,000 km) | |
| Eccentricity | <0.076 |
| Orbital period | 10.8540774(21) d |
| Inclination | 89.815°+0.036° −0.63° |
| Star | Kepler-20 (KOI-070) |
| Physical characteristics[1] | |
| Mean radius | 2.894+0.036 −0.033 R⊕ |
| Mass | 11.1±2.1 M⊕ |
| Mean density | 2.51+0.48 −0.47 g⋅cm−3 |
| Physics | 828±11 K (555 °C; 1,031 °F, equilibrium) |
Kepler-20c is an exoplanet orbiting Kepler-20. It has a mass similar to Neptune but is slightly smaller. Despite being the third-closest planet to Kepler-20, it is still close to the star, meaning that it is a hot Neptune. Along with the other four planets in the system, Kepler-20c was announced on 20 December 2011.
References
- ↑ 1.0 1.1 Bonomo, A. S. 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. doi:10.1051/0004-6361/202346211. Bibcode: 2023A&A...677A..33B.
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