HAT-P-8

HAT-P-8
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]
Distance700 ± 3 ly
(214.6 ± 1.0 pc)
Details
Mass1.27±0.03[4] M
Radius1.491+0.016
−0.014
[4] R
Surface gravity (log g)4.1956+0.0095
−0.013
[4] cgs
Temperature6410±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
Age3.4 ± 1 Gyr
Other designations
Gaia DR3 1891507552826485632, TYC 2757-1152-1, GSC 02757-01152, 2MASS J22520985+3526495[2]
Database references
SIMBADdata

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]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Latham2009 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Wang2021 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Torres2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Bechter2014 was invoked but never defined (see the help page).