Topzle Updated: Wikipedia source
K2-18, also known as EPIC 201912552, is a red dwarf star with two planetary companions located 124 light-years (38 parsecs) from Earth, in the constellation of Leo. Its name is because it was discovered by the K2 Mission, which extended the mission of the Kepler Space Telescope after failure of two of its reaction wheels.
| Companion(in order from star) | Mass | Semimajor axis(AU) | Orbital period(days) | Eccentricity | Inclination | Radius |
| c | ≥5.62±0.84 M🜨 | 0.0670 ± 0.0002 | 9.2072±0.0065 | <0.2 | — | — |
| b | 8.63±1.35 M🜨 | 0.1591±0.0004 | 32.94488±0.00281 | 0.09 | — | 2.711±0.065 R🜨 |