Kepler-20d
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | Kepler-20 (KOI-070) | |
Constellation | Lyra | |
Right ascension | (α) | 19h 10m 47.524s |
Declination | (δ) | +42° 20′ 19.30″ |
Apparent magnitude | (mV) | 12.51 |
Mass | (m) | ±0.035 0.912 M☉ |
Radius | (r) | +0.06 −0.095 0.944 R☉ |
Temperature | (T) | ±93 5466 K |
Metallicity | [Fe/H] | ±0.04 0.02 |
Age | +4.7 −2.7 8.8 Gyr | |
Physical characteristics | ||
Mass | (m) | <20.1 M⊕ |
Radius | (r) | +0.17 −0.30 2.75R⊕ |
Density | (ρ) | <4.07 g cm−3 |
Temperature | (T) | 369 K (96 °C; 205 °F) |
Orbital elements | ||
Semi-major axis | (a) | 0.3453 AU |
Eccentricity | (e) | <0.60 |
Orbital period | (P) | 77.61184 d |
Inclination | (i) | 89.570° |
Discovery information | ||
Discovery date | 20 December 2011 | |
Discoverer(s) | Kepler team | |
Discovery method | Transit (Kepler Mission) | |
Discovery status | Conference announcement |
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.
Sources
http://kepler.nasa.gov/Mission/discoveries/kepler20d/
This article is issued from Wikipedia - version of the 11/19/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.