HAT-P-7
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 59.353s[1] |
| Declination | +47° 58′ 10.24″[1] |
| Apparent magnitude (V) | 10.46[2] |
| Characteristics | |
| Spectral type | F8[2] |
| Apparent magnitude (B) | ~10.90[2] |
| Apparent magnitude (V) | ~10.46[2] |
| Apparent magnitude (J) | 9.555 ± 0.030[2] |
| Apparent magnitude (H) | 9.344 ± 0.029[2] |
| Apparent magnitude (K) | 9.334 ± 0.018[2] |
| Astrometry | |
| Proper motion (μ) | RA: –17.7 ± 0.9[1] mas/yr Dec.: 9.9 ± 1.0[1] mas/yr |
| Distance | 1044 +163 −130 ly (320 +50 −40 pc) |
| Details | |
| Mass | 1.47+0.8 −0.5 M☉ |
| Radius | 1.84+0.23 −0.11 R☉ |
| Surface gravity (log g) | 4.02 ± 0.01[3] cgs |
| Temperature | 6441 ± 69[3] K |
| Metallicity [Fe/H] | 0.15 ± 0.08[3] dex |
| Rotational velocity (v sin i) | 5.0 ± 1.2[3] km/s |
| 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.[2]
Planetary system
This star has one planet. This star system is within the field of view of the now-operational Kepler Mission planet-hunter spacecraft.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.776 +0.077 −0.049 MJ |
0.0377 ± 0.0005 | 2.2047299 ± (4×10−6) | 0 | — | 1.421 RJ |
See also
- HATNet Project
- Kepler Mission
References
- ↑ 1.0 1.1 1.2 1.3 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
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 "SIMBAD query result: NAME HAT-P-7 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-22.
- ↑ 3.0 3.1 3.2 3.3 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.
- ↑ Pál, 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.
External links
- "HAT-P-7". Exoplanets. Retrieved 2009-05-03.
Coordinates: 
19h 28m 59s, +47° 58′ 10″
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