HAT-P-8

HAT-P-8
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Pegasus
Right ascension	22h 52m 09.8636s
Declination	+35° 26′ 49.608″
Apparent magnitude (V)	10.17
Characteristics
Spectral type	F
Apparent magnitude (B)	10.77 ± 0.04
Apparent magnitude (V)	10.36 ± 0.03
Apparent magnitude (J)	9.214 ± 0.022
Apparent magnitude (H)	9.004 ± 0.018
Apparent magnitude (K)	8.953 ± 0.013
Variable type	planetary transit
Astrometry
Radial velocity (Rv)	−22.2±0.3 km/s
Proper motion (μ)	RA: 74.676(19) mas/yr ; Dec.: 14.944(20) mas/yr
Parallax (π)	4.6606 ± 0.0208 mas
Distance	700 ± 3 ly ; (214.6 ± 1.0 pc)
Details
Mass	1.27±0.03 M☉
Radius	1.491+0.016; −0.014 R☉
Surface gravity (log g)	4.1956+0.0095; −0.013 cgs
Temperature	6410±140 K
Metallicity [Fe/H]	-0.018+0.0072; −0.056 dex
Rotational velocity (v sin i)	12.6 ± 1.0 km/s
Age	3.4 ± 1 Gyr
Other designations
	Gaia DR3 1891507552826485632, TYC 2757-1152-1, GSC 02757-01152, 2MASS J22520985+3526495
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]

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

[EDR3-1] Cite error: The named reference EDR3 was invoked but never defined (see the help page).

[SIMBAD-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[Latham2009-3] Cite error: The named reference Latham2009 was invoked but never defined (see the help page).

[Wang2021-4] Cite error: The named reference Wang2021 was invoked but never defined (see the help page).

[Torres2012-5] Cite error: The named reference Torres2012 was invoked but never defined (see the help page).

[Bechter2014-6] Cite error: The named reference Bechter2014 was invoked but never defined (see the help page).

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Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Pegasus
Right ascension	22^h 52^m 09.8636^s^[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 (R_v)	−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
Gaia DR3 1891507552826485632, TYC 2757-1152-1, GSC 02757-01152, 2MASS J22520985+3526495^[2]
Database references
SIMBAD	data