K2-28
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 22m 29.8611s |
| Declination | −07° 57′ 19.853″ |
| Apparent magnitude (V) | 16.06 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | M4V |
| Apparent magnitude (J) | 11.695±0.030 |
| Apparent magnitude (H) | 11.028±0.023 |
| Apparent magnitude (K) | 10.746±0.023 |
| Variable type | Planetary transit variable |
| Astrometry | |
| Radial velocity (Rv) | 11.7 km/s |
| Proper motion (μ) | RA: −254.604(41) mas/yr Dec.: −194.554(30) mas/yr |
| Parallax (π) | 15.8734±0.0343 mas |
| Distance | 205.5 ± 0.4 ly (63.0 ± 0.1 pc) |
| Details | |
| Mass | 0.257±0.048 M☉ |
| Radius | 0.288±0.028 R☉ |
| Luminosity | 0.0118 L☉ |
| Surface gravity (log g) | 4.93±0.04 cgs |
| Temperature | 3214±60 K |
| Metallicity [Fe/H] | 0.26±0.10 dex |
| Other designations | |
| Gaia DR2 2622296783699476864, LP 700-6, NLTT 53655, EPIC 206318379 | |
| Database references | |
| SIMBAD | data |
K2-28 is a metal rich M4-type main sequence star. One confirmed transiting exoplanet is known to orbit this star. There is another star 5.2 arcseconds to the north–east of K2-28. However, this star has a different proper motion, and is therefore physically unrelated and probably a background star.