| 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 |
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]
EDR3 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).Latham2009 was invoked but never defined (see the help page).Wang2021 was invoked but never defined (see the help page).Torres2012 was invoked but never defined (see the help page).Bechter2014 was invoked but never defined (see the help page).