HAT-P-8
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 52m 09.865s[1] |
| Declination | +35° 26′ 49.63″[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] |
| Astrometry | |
| Proper motion (μ) | RA: 75.1 ± 0.8[1] mas/yr Dec.: 14.8 ± 0.7[1] mas/yr |
| Distance | 750 ± 50 ly (230 ± 15 pc) |
| Details | |
| Mass | 1.28 ± 0.04[3] M☉ |
| Radius | 1.58+0.08 −0.06[3] R☉ |
| Surface gravity (log g) | 4.19 ± 0.03[4] cgs |
| Temperature | 6223 ± 67[4] K |
| Metallicity [Fe/H] | -0.04 ± 0.08[4] dex |
| Rotational velocity (v sin i) | 12.6 ± 1.0[4] km/s |
| Age | 3.4 ± 1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
HAT-P-8 is a magnitude 10 star located 750 light-years away in Pegasus.[2]
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.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.52+0.18−0.16 MJ | 0.0487 ± 0.00026 | 3.07632 ± 0.000004 | ~0 | — | — |
See also
References
- 1 2 3 4 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal 145 (2). 44. arXiv:1212.6182. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry
- 1 2 3 4 5 6 7 "SIMBAD query result: NAME HAT-P-8 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
- 1 2 3 4 Latham, David W.; et al. (2009). "Discovery of a Transiting Planet and Eight Eclipsing Binaries in HATNet Field G205". The Astrophysical Journal 704 (2): 1107–1119. arXiv:0812.1161. Bibcode:2009ApJ...704.1107L. doi:10.1088/0004-637X/704/2/1107.
- 1 2 3 4 Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal 757 (2). 161. arXiv:1208.1268. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
External links
Coordinates: 
22h 52m 09.862s, +35° 26′ 49.59″
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