HAT-P-7
HAT-P-7 is a F-type main sequence star located about 1123 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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 28m 59.3538s[1] |
| Declination | +47° 58′ 10.2163″[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: −18.281 ± 0.038[1] mas/yr Dec.: 8.910 ± 0.037[1] mas/yr |
| Parallax (π) | 2.9031 ± 0.0206[1] mas |
| Distance | 1,123 ± 8 ly (344 ± 2 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 |
Planetary system
This star has only one known planet, HAT-P-7b. This star system was within the initial field of view of the Kepler planet-hunting spacecraft.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.806±0.036 MJ | 0.03813±0.00036 | 2.204737±0.000017 | <0.0040 | — | 1.64±0.11 RJ |
See also
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "HAT-P-7". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-29.
- 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.
- Morris, Brett M.; et al. (2013). "Kepler's Optical Secondary Eclipse of HAT-P-7b and Probable Detection of Planet-induced Stellar Gravity Darkening". The Astrophysical Journal Letters. 764 (2). L22. arXiv:1301.4503. Bibcode:2013ApJ...764L..22M. doi:10.1088/2041-8205/764/2/L22.
- Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics. 602. A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
- Rhodes, Michael D.; Puskullu, Caglar; Budding, Edwin; Banks, Timothy S. (2020). "Exoplanet System Kepler-2 with comparisons to Kepler-1 and 13". Astrophysics and Space Science. 365 (4). arXiv:2004.07971. doi:10.1007/s10509-020-03789-3. S2CID 215814387.
External links
- "HAT-P-7". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-03.
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