HAT-P-8

HAT-P-8
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pegasus
Right ascension 22h 52m 09.862s[1]
Declination +35° 26′ 49.59″[1]
Apparent magnitude (V) 10.17[1]
Characteristics
Spectral type F[2]
Apparent magnitude (B) 10.77 ±0.04[1]
Apparent magnitude (V) 10.36 ±0.03[1]
Apparent magnitude (J) 9.214 ±0.022[1]
Apparent magnitude (H) 9.004 ±0.018[1]
Apparent magnitude (K) 8.953 ±0.013[1]
Astrometry
Proper motion (μ) RA: 75.5 ±2.8[1] mas/yr
Dec.: 17.2 ±2.8[1] mas/yr
Distance 750 ± 50 ly
(230 ± 15 pc)
Details
Mass 1.28 ± 0.04 [2] M☉
Radius 1.58 (−0.06+0.08)[2] R☉
Temperature 6200 ±80 K
Metallicity 0.01 ±0.08
Age 3.4 ±1 × 109 years
Other designations
GSC 02757-01152, 2MASS J22520985+3526495, TYC 2757-1152-1, UCAC2 44236767
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia		 data

HAT-P-8 is a magnitude 10 star located 750 light-years away in Pegasus.[1]

Contents

Planetary system

In 2008 the HATNet Project announced the discovery of extrasolar planet HAT-P-8b around this star. This planet is hot jupiter gas giant planet.[2]

The HAT-P-8 system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
b 1.52+0.18−0.16 MJ 0.0487 ± 0.00026 3.07632 ± 0.000004 ~0

See also

References

  1. ^ a b c d e f g h i j k "SIMBAD query result: NAME HAT-P-8 -- Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GSC02757-01152. Retrieved 2009-04-24. 
  2. ^ a b c d Latham et al. (2008). "HATNet Field G205: Follow-Up Observations of 28 Transiting-Planet candidates and Confirmation of the Planet HAT-P-8b". arXiv:0812.1161 [astro-ph]. 

External links

Coordinates: 22h 52m 09.862s, +35° 26′ 49.59″