Kepler-421
Kepler-421 (KOI-1274 A) is a yellow main sequence star, being of spectral class G7V. Orange star of spectral class K9V (KOI-1274 B), projected on sky plane just 1.085″ away, is not physically associated to it. The distance to star KOI-1274 A is approximately 1150 light-years, and to KOI-1274 B is about 1900 light-years.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 53m 01.6406s |
| Declination | 45° 5′ 15.9725″ |
| Apparent magnitude (V) | 13.56±0.04 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G7V or K9V |
| Astrometry | |
| Proper motion (μ) | RA: −4.010±0.032 mas/yr Dec.: −20.398±0.037 mas/yr |
| Parallax (π) | 2.8401 ± 0.0166 mas |
| Distance | 1,148 ± 7 ly (352 ± 2 pc) |
| Details | |
| Mass | 0.76 M☉ |
| Radius | 0.83+0.04 −0.03 R☉ |
| Luminosity | 0.451 L☉ |
| Surface gravity (log g) | 4.54 cgs |
| Temperature | 5,308±50 K |
| Metallicity [Fe/H] | −0.25±0.08 dex |
| Rotation | 28.5±0.3 d |
| Rotational velocity (v sin i) | 1.5±0.5 km/s |
| Age | 14.38 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
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