K2-3
K2-3, also known as EPIC 201367065, is a red dwarf star with three known planets. It is on the borderline of being a late orange dwarf/K-type star, but because of its temperature, it is classified as a red dwarf (4,000 K is typically the division line between spectral class M and K).
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 29m 20.39171s |
| Declination | −01° 27′ 17.2817″ |
| Apparent magnitude (V) | 12.168±0.009 |
| Characteristics | |
| Spectral type | M0V |
| B−V color index | 1.35 ± 0.06 |
| Astrometry | |
| Radial velocity (Rv) | 30.24±0.46 km/s |
| Proper motion (μ) | RA: 94.116 mas/yr Dec.: −78.003 mas/yr |
| Parallax (π) | 22.7374 ± 0.0220 mas |
| Distance | 143.4 ± 0.1 ly (43.98 ± 0.04 pc) |
| Details | |
| Mass | 0.549+0.029 −0.027 M☉ |
| Radius | 0.546+0.018 −0.016 R☉ |
| Luminosity (bolometric) | 0.0587+0.0018 −0.0019 L☉ |
| Surface gravity (log g) | 4.704+0.023 −0.026 cgs |
| Temperature | 3844+61 −63 K |
| Metallicity [Fe/H] | −0.157+0.075 −0.080 dex |
| Rotation | 40±2 d |
| Age | 6.9±4.7 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
At a distance of 143 light-years (44 parsecs), the star's proximity means it is bright enough to make it feasible for astronomers to study the planets' atmospheres to determine whether they are like Earth's atmosphere and possibly conducive to life.
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