HAT-P-8
Magnitude 10 F-type star in the constellation Pegasus / From Wikipedia, the free encyclopedia
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HAT-P-8 is a magnitude 10 star located 700 light-years away in Pegasus.[2] It is a F-type star about 28% more massive than the Sun.[3] Two red dwarf companions have been detected around HAT-P-8. The first has a spectral type of M5V and has a mass of 0.22 M☉. The second is even less massive, at 0.18 M☉, and its spectral type is M6V.[6]
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Pegasus |
Right ascension | 22h 52m 09.8636s[1] |
Declination | +35° 26′ 49.608″[1] |
Apparent magnitude (V) | 10.17[2] |
Characteristics | |
Spectral type | F[3] |
Apparent magnitude (B) | 10.77 ± 0.04[2] |
Apparent magnitude (V) | 10.36 ± 0.03[2] |
Apparent magnitude (J) | 9.214 ± 0.022[2] |
Apparent magnitude (H) | 9.004 ± 0.018[2] |
Apparent magnitude (K) | 8.953 ± 0.013[2] |
Variable type | planetary transit[3] |
Astrometry | |
Radial velocity (Rv) | −22.2±0.3[1] km/s |
Proper motion (μ) | RA: 74.676(19) mas/yr[1] Dec.: 14.944(20) mas/yr[1] |
Parallax (π) | 4.6606 ± 0.0208 mas[1] |
Distance | 700 ± 3 ly (214.6 ± 1.0 pc) |
Details | |
Mass | 1.27±0.03[4] M☉ |
Radius | 1.491+0.016 −0.014[4] R☉ |
Surface gravity (log g) | 4.1956+0.0095 −0.013[4] cgs |
Temperature | 6410±140[4] K |
Metallicity [Fe/H] | -0.018+0.0072 −0.056[4] dex |
Rotational velocity (v sin i) | 12.6 ± 1.0[5] km/s |
Age | 3.4 ± 1 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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