Kepler-37c

Kepler-37c is an exoplanet discovered by the Kepler space telescope in February 2013.^[3] With an orbital period of 21 days,^[4] it is located 209 light-years away, in the constellation Lyra.

Kepler-37c

Discovery[1]
Discovery site	Kepler space telescope
Discovery date	2013
Detection method	Transit
Orbital characteristics[2]
Semi-major axis	0.1390±0.0020 AU
Eccentricity	<0.099
Orbital period (sidereal)	21.301848(18) d
Inclination	89.07°+0.19° −0.33°
Star	Kepler-37
Physical characteristics[2]
Mean radius	0.755+0.033 −0.055 R🜨
Mass	<1.3 M🜨
Temperature	615±9 K (342 °C; 647 °F, equilibrium)

Host star

Main article: Kepler-37

The planet orbits a (G-type) star similar to the Sun, named Kepler-37, orbited by a total of four planets. The star has a mass of 0.80 M_☉ and a radius of 0.79 R_☉. It has a temperature of, 5417 K and is 5.66 billion years old. In comparison, the Sun is 4.6 billion years old,^[5] and has a temperature of 5778 K.^[6]

The star's apparent magnitude, or how bright it appears from Earth's perspective, is 9.71. Therefore, it is too dim to be seen with the naked eye.

See also

• List of planets discovered by the Kepler spacecraft