HAT-P-7
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 28m 59.3534s[1] |
Declination | +47° 58′ 10.229″[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: ±0.9 −17.7[3] mas/yr Dec.: ±1.0 9.9[3] mas/yr |
Parallax (π) | 2.99 ± 0.42[1] mas |
Distance | approx. 1,100 ly (approx. 330 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[4] cgs |
Temperature | 6441 ± 69[4] K |
Metallicity [Fe/H] | 0.15 ± 0.08[4] dex |
Rotational velocity (v sin i) | 5.0 ± 1.2[4] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Extrasolar Planets Encyclopaedia | data |
HAT-P-7 is a F-type main sequence star located about 1100 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 only one planet, HAT-P-7b. This star system was within the initial field of view of the Kepler planet-hunting spacecraft.[5]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ±0.036 1.806 MJ | 13±0.00036 0.038 | 737±0.000017 2.204 | <0.0040 | — | — |
See also
References
- 1 2 3 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
- 1 2 3 4 5 6 7 8 9 "NAME HAT-P-7". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-22.
- 1 2 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 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.
External links
- "HAT-P-7". Exoplanets. Retrieved 2009-05-03.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.