Kepler-28
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 28m 32.8905s[2] |
| Declination | +42° 25′ 45.959″[2] |
| Apparent magnitude (V) | 15.306[3] |
| Characteristics | |
| Spectral type | M0V[4] |
| Astrometry | |
| Proper motion (μ) | RA: −0.488±0.042[2] mas/yr Dec.: 11.692±0.042[2] mas/yr |
| Parallax (π) | 2.2527 ± 0.0241[2] mas |
| Distance | 1,450 ± 20 ly (444 ± 5 pc) |
| Details | |
| Mass | 0.75[3] M☉ |
| Radius | 0.70[3] R☉ |
| Luminosity | [3] L☉ |
| Temperature | 4590[3] K |
| Metallicity [Fe/H] | 0.34[3] dex |
| Rotation | 17.951±0.016 days[5] |
| Rotational velocity (v sin i) | 0.6[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-28 is a star in the northern constellation of Cygnus., It is orbited by two exoplanets. It is located at the celestial coordinates: Right Ascension 19h 28m 32.8905s, Declination +42° 25′ 45.959″.[2] With an apparent visual magnitude of 15.036,[3] this star is too faint to be seen with the naked eye.
Planetary system[]
The two warm sub-Neptune gas giant[6] planets of Kepler-28 were discovered in 2011 and were confirmed in early 2012.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.8+3.8 −3.1 M |