KELT-2
KELT-2 (also called HD 42176) is a yellow white main sequence star located about 439 light-years away in the constellation Auriga. The apparent magnitude of this star is 8.77, which means it is not visible to the naked eye but can be seen with a binoculars.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 10m 39.345s |
| Declination | +30° 57′ 25.71″ |
| Apparent magnitude (V) | 8.68 |
| Characteristics | |
| Spectral type | F7 V |
| B−V color index | 0.53 |
| Astrometry | |
| Radial velocity (Rv) | −47.38 km/s |
| Proper motion (μ) | RA: 16.865 mas/yr Dec.: −2.155 mas/yr |
| Parallax (π) | 7.4327 ± 0.0217 mas |
| Distance | 439 ± 1 ly (134.5 ± 0.4 pc) |
| Absolute magnitude (MV) | 3.27 |
| Details | |
| Mass | 1.314+0.063 −0.06 M☉ |
| Radius | 1.84+0.07 −0.05 R☉ |
| Luminosity | 3.6 L☉ |
| Surface gravity (log g) | 4.03+0.02 −0.03 cgs |
| Temperature | 6148±48 K |
| Metallicity | 0.03±0.08 |
| Rotation | 12.9+0.2 −0.5 d |
| Rotational velocity (v sin i) | 9±2 km/s |
| Age | 3.97±0.01 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
KELT-2A is the primary star in the common-proper-motion binary star system KELT-2 (HD 42176). KELT-2B is an early K dwarf approximately 295 AU away, which was discovered simultaneously with the planet KELT-2Ab.
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