KELT-6
Star in the constellation Coma Berenices
From Wikipedia, the free encyclopedia
KELT-6, also known as BD+31 2447, is a star in the constellation Coma Berenices. With an apparent magnitude of 10.34, it is impossible to see with the unaided eye, but can be seen with a powerful telescope. The star is located 791 light years away from the Solar System based on parallax, but is drifting away with a radial velocity of 1.62 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices[1] |
| Right ascension | 13h 03m 55.65s[2] |
| Declination | +30° 38′ 24.28″[2] |
| Apparent magnitude (V) | 10.34±0.05[3] |
| Characteristics | |
| Spectral type | F8IV-V[3] |
| Astrometry | |
| Radial velocity (Rv) | 1.62±0.27[2] km/s |
| Proper motion (μ) | RA: −5.106±0.052 mas/yr[2] Dec.: +15.640±0.046 mas/yr[2] |
| Parallax (π) | 4.1255±0.0338 mas[2] |
| Distance | 791 ± 6 ly (242 ± 2 pc) |
| Details | |
| Mass | 1.13±0.06[4] M☉ |
| Radius | 1.53±0.14[4] R☉ |
| Luminosity | 3.25+0.94 −0.81[3] L☉ |
| Surface gravity (log g) | 4.07±0.06[5] cgs |
| Temperature | 6,272±61[4] K |
| Metallicity [Fe/H] | -0.28[5] dex |
| Rotational velocity (v sin i) | 4.53±0.26[6] km/s |
| Age | 4.9+0.7 −0.5[4] Gyr |
| Other designations | |
| BD+31 2447, Gaia DR2 1464700950221781504 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Properties
KELT-6 is an F-type star that is 13% more massive and 53% larger than the Sun. It radiates at 3.25 times the Sun's luminosity from its photosphere at an effective temperature of 6,727 K. KELT-6 has a projected rotational velocity of 4.53 km/s, and is slightly older than the Sun, with an age of 4.9 billion years. Unlike most host stars of exoplanets, it has a poor metallicity, with 52.5% the abundance of heavy metals compared to the Sun.
Planetary system
In 2013, a long period "hot Jupiter" was discovered orbiting the star using the transit method.[3] Another planet was discovered in 2015 using the radial velocity (doppler spectroscopy) method.[6]
