HAT-P-7
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(Redirected from GSC 03547-01402)
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 59.3616s[1] |
| Declination | +47° 58′ 10.264″[1] |
| Apparent magnitude (V) | 10.46[1] |
| Characteristics | |
| Spectral type | F8[1] |
| Apparent magnitude (B) | ~10.90[1] |
| Apparent magnitude (V) | ~10.46[1] |
| Apparent magnitude (J) | 9.555 ±0.030[1] |
| Apparent magnitude (H) | 9.344 ±0.029[1] |
| Apparent magnitude (K) | 9.334 ±0.018[1] |
| Astrometry | |
| Proper motion (μ) | RA: -13.40[1] mas/yr Dec.: 12.90[1] mas/yr |
| Distance | 1044 (−130+163) ly (320 (−40+50) pc) |
| Details | |
| Mass | 1.47 (−0.5 +0.8) M☉ |
| Radius | 1.84 (−0.11 +0.23) R☉ |
| Temperature | 6350 ±80 K |
| Metallicity | 0.26 ±0.08 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HAT-P-7 is a yellow white dwarf star located about 1044 light-years away in the constellation Cygnus. The apparent magnitude of this star is 10.5, which means it is not visible to the naked eye but can be seen with a small telescope on a clear dark night.[1]
Contents |
[edit] Planetary system
This star has one known planet, the extrasolar planet HAT-P-7b. This star system is within the field of view of the now-operational Kepler Mission planet-hunter spacecraft.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | 1.776 +0.077 −0.049 MJ |
0.0377 ± 0.0005 | 2.2047299 ± (4×10-6) | 0 |
[edit] See also
[edit] References
- ^ a b c d e f g h i j k l m "SIMBAD query result: NAME HAT-P-7 -- Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GSC03547-01402. Retrieved 2009-04-22.
- ^ Pal et al.; Bakos, G. Á.; Torres, G.; Noyes, R. W.; Latham, D. W.; Kovács, Géza; Marcy, G. W.; Fischer, D. A. et al (2008). "HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field". The Astrophysical Journal 680 (2): 1450–1456. arXiv:0803.0746. Bibcode 2008ApJ...680.1450P. doi:10.1086/588010.
[edit] External links
- "HAT-P-7". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HAT-P-7. Retrieved 2009-05-03.
