K2-66b is a confirmed mega-Earth orbiting the subgiant K2-66, about from Earth in the direction of Aquarius. It is an extremely hot and dense planet heavier than Neptune, but with only about half its radius.
Planet properties
Mass, radius, and temperature
K2-66b is a mega-Earth with radius and mass . The planet's temperature is highly variable due to the variability of its host star, and is currently estimated at .
Orbit
The planet orbits every 5.07 days at 0.06 AU. It orbits within a "photoevaporation desert", where orbiting exoplanets should be very uncommon. K2-66b's orbit is nearly circular.
Star
The star, K2-66 is a G1 sub-giant in Aquarius. It has a sun-like temperature of 5887 K, which corresponds to its spectral class and is very close to that of the rotationally variable star Kepler-130. It has a radius of and a mass of . Its metallicity is −0.047, and its apparent magnitude is 11.71.
See also
Kepler
Mega-Earth
K2-56b
Sub-giant
G-type main sequence star
Density
List of exoplanets discovered in 2017
List of exoplanets discovered in 2016
Lava planet
Stellar evolution
References
External links
Kepler-130
SIMBAD: Kepler-130
Exoplanets discovered in 2016
Mega-Earths
Aquarius (constellation) Transiting exoplanets Exoplanets discovered by K2