K2-187
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 50m 05.67s |
| Declination | +23° 11′ 33.36″ |
| Apparent magnitude (V) | 12.864 (Kepler magnitude)[2] |
| Characteristics | |
| Spectral type | G |
| Astrometry | |
| Proper motion (μ) | RA: -11.864 mas/yr Dec.: -30.702 mas/yr |
| Parallax (π) | 2.9939 ± 0.0510[3] mas |
| Distance | 1,090 ± 20 ly (334 ± 6 pc) |
| Details | |
| Mass | 0.966999 +0.025227 −0.024169[1] M☉ |
| Radius | 0.894913 +0.041087 −0.025505[1] R☉ |
| Temperature | 5477 ± 50[2] K |
| Metallicity [Fe/H] | +0.26 ± 0.08[2] dex |
| Other designations | |
EPIC 212157262, K2-187, WISE J085005.65+231133.0, 2MASS J08500566+2311333 | |
| Database references | |
| SIMBAD | data |
K2-187, also known as EPIC 212157262, is a Sun-like star in K2 Campaign 5. It is very close in size and temperature to the Sun, and has a system of four confirmed exoplanets ranging between 1.4 REarth and 3.2 REarth. The innermost planet takes just 18 hours to orbit its star, while the outermost planet orbits every 2 weeks.[2]
Planetary system[]
K2-187 has at least four orbiting exoplanets: two Super-Earths, one Hot Neptune, and one Mini-Neptune. All four planets are in near-resonances with each other and are far too hot for life.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.016322 | 0.773981+0.000052 −0.000050 |
— | 81.930168+5.825258 −11.735217° |
1.30+0.13 −0.13 R |