Kepler-20c is an
exoplanet orbiting
Kepler-20
Kepler-20 is a star 929 light-years from Earth in the constellation Lyra with a system of six known planets. The apparent magnitude of this star is 12.51, so it cannot be seen with the unaided eye. Viewing it requires a telescope with an a ...
. It has a mass similar to
Neptune but is slightly smaller. Despite being the third-closest planet to
Kepler-20
Kepler-20 is a star 929 light-years from Earth in the constellation Lyra with a system of six known planets. The apparent magnitude of this star is 12.51, so it cannot be seen with the unaided eye. Viewing it requires a telescope with an a ...
, it is still close to the star, meaning that it is a
hot Neptune
A hot Neptune or Hoptune is a type of giant planet with a mass similar to that of Uranus or Neptune orbiting close to its star, normally within less than 1 AU. The first hot Neptune to be discovered with certainty was Gliese 436 b in 2007, an exo ...
. Along with the other four planets in the system, Kepler-20c was announced on 20 December 2011.
References
Exoplanets discovered in 2011
C
20c
Hot Neptunes
Transiting exoplanets
{{Extrasolar-planet-stub