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]

HAT-P-7
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
Distance1,123 ± 8 ly
(344 ± 2 pc)
Details
Mass1.47+0.8
−0.5 M☉
Radius1.84+0.23
−0.11 R☉
Surface gravity (log g)4.02 ± 0.01[3] cgs
Temperature6441 ± 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
KOI-2, KIC 10666592, TYC 3547-1402-1, GSC 03547-01402, 2MASS J19285935+4758102[2]
Database references
SIMBADdata

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]

The HAT-P-7 planetary system[5][6][7]
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
gollark: The others are unencrypted.
gollark: On port 6697.
gollark: irc.osmarks.net supports TLS sometimes.
gollark: Another great IRC thing: horrible fragmentation.
gollark: But I need multiple bismuths and a stellated dodecahedron.

See also

References
  1. 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.
  2. "HAT-P-7". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-29.
  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.
  4. 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.
  5. 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.
  6. 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.
  7. Rhodes, Michael D.; Puskullu, Caglar; Budding, Edwin; Banks, Timothy S. (2020). "Exoplanet System Kepler-2 with comparisons to Kepler-1 and 13". arXiv:2004.07971 [astro-ph.EP].

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