K2-3c

K2-3c, also known as EPIC 201367065 c, is an exoplanet orbiting the red dwarf star K2-3 every 24 days. It is 143 light-years away.^[3] It has a density of about 3.7 g/cm³, indicating that it could be an ocean world or a mini-Neptune. It is the second-smallest planet in the system by both radius and mass, with a mass almost three times that of Earth.^[4]

K2-3c

Discovery[1]
Discovery site	Kepler Space Observatory
Discovery date	2015
Detection method	Transit
Orbital characteristics[2]
Semi-major axis	0.1357+0.0023 −0.0022 AU
Eccentricity	0.048+0.073 −0.035
Orbital period (sidereal)	24.646729+0.000044 −0.000042 d
Inclination	89.84°+0.11° −0.14°
Argument of periastron	−180°+100° −110°
Semi-amplitude	0.88±0.28 m/s
Star	K2-3
Physical characteristics[2]
Mean radius	1.582+0.057 −0.051 R🜨
Mass	2.68±0.85 M🜨
Mean density	3.7±1.2 g/cm3
Temperature	371.8+3.8 −3.9 K (98.7 °C; 209.6 °F, equilibrium)