K2-3b
| Discovery | |
|---|---|
| Discovery site | Kepler Space Observatory |
| Discovery date | 2015 |
| Transit | |
| Orbital characteristics | |
| 0.0747+0.0013 −0.0012 AU | |
| Eccentricity | 0.107+0.057 −0.059 |
| 10.0546535+0.0000088 −0.0000091 d | |
| Inclination | 89.40°+0.34° −0.22° |
| 188°+32° −34° | |
| Semi-amplitude | 2.27±0.28 m/s |
| Star | K2-3 |
| Physical characteristics | |
| 2.078+0.076 −0.067 R🜨 | |
| Mass | 5.11+0.65 −0.64 M🜨 |
Mean density | 3.11+0.49 −0.46 g/cm3 |
| Temperature | 501.3+5.1 −5.2 K (228.2 °C; 442.7 °F, equilibrium) |
K2-3b, also known as EPIC 201367065 b, is an exoplanet orbiting the red dwarf K2-3 every 10 days. It is the largest and most massive planet of the K2-3 system, with about 2.1 times the radius of Earth and about 5 times the mass. Its density of about 3.1 g/cm3 may indicate a composition of almost entirely water, or a hydrogen envelope comprising about 0.7% of the planet's mass.