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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]
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]
Proper motion (μ) RA: −17.7±0.9[3] mas/yr
Dec.: 9.9±1.0[3] mas/yr
Parallax (π)2.99 ± 0.42[1] mas
Distanceapprox. 1,100 ly
(approx. 330 pc)
Surface gravity (log g)4.02 ± 0.01[4] cgs
Temperature6441 ± 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
GSC 03547-01402, KIC 10666592, KOI 2, 2MASS J19285935+4758102, TYC 3547-1402-1[2]
Database references
Extrasolar Planets

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[edit]

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.[5]

The HAT-P-7 planetary system[6][7]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b 1.806±0.036 MJ 0.03813±0.00036 2.204737±0.000017 <0.0040

See also[edit]


  1. ^ a b c 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
  2. ^ a b c d e f g h i "NAME HAT-P-7". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-22.
  3. ^ a b 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
  4. ^ a b c d 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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[edit]

Coordinates: Sky map 19h 28m 59s, +47° 58′ 10″