HAT-P-6

HAT-P-6
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 23h 39m 05.810s[1]
Declination +42° 27′ 57.50″[1]
Apparent magnitude (V) +10.54
Characteristics
Spectral type F
Variable type planetary transit
Astrometry
Proper motion (μ) RA: –20.2 ± 0.6[1] mas/yr
Dec.: 2.6 ± 0.5[1] mas/yr
Distanceapprox. 650 ly
(approx. 200 pc)
Absolute magnitude (MV)+4.03
Details
Mass1.29 ± 0.06 M☉
Radius1.46 ± 0.06 R☉
Luminosity3.55 L☉
Surface gravity (log g)4.22 ± 0.03[2] cgs
Temperature6687 ± 71[2] K
Metallicity [Fe/H]–0.11 ± 0.08[2] dex
Rotational velocity (v sin i)8.9 ± 1.2[2] km/s
Age2.3+0.5
−0.7 Gyr
Other designations
GSC 03239-00992, 2MASS J23390581+4227575, TYC 3239-992-1
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

HAT-P-6 is a star in the constellation Andromeda, located approximately 650 light years or 200 parsecs away from the Earth. It is an F-type star, implying that it is hotter and more massive than our Sun. The apparent magnitude of the star is +10.54, which can only be visible through the telescope. The absolute magnitude +4.03 is brighter than the Sun’s +4.83, meaning that the star itself is brighter than the Sun.[3] A search for a binary companion star using adaptive optics at the MMT Observatory was negative.[4]

Planetary system

The companion planet HAT-P-6b is a transiting planet discovered on October 15, 2007 by HATNet Project. The planet’s true mass is slightly more than Jupiter at only 5.7%, but the radius is 33% greater, making the planet’s density of 0.45 g/cm3. Its large size compared to mass comes from the great amount of heat received from the nearby star that expands the planet’s atmosphere, categorizing as "hot Jupiter". The orbital period is 3.852985 days and the distance from its star is 0.05235 AU. The inclination of the orbit is 85.51º.[3]

The HAT-P-6 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.057 ± 0.119 MJ 0.05235 ± 0.00087 3.852985 ± 5e-06 0 — —

See also

References

  1. 1 2 3 4 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal. 145 (2). 44. arXiv:1212.6182Freely accessible. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry
  2. 1 2 3 4 Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal. 757 (2). 161. arXiv:1208.1268Freely accessible. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
  3. 1 2 Noyes, R. W.; et al. (2008). "HAT-P-6b: A Hot Jupiter Transiting a Bright F Star". The Astrophysical Journal Letters. 673 (1): L79–L82. arXiv:0710.2894Freely accessible. Bibcode:2008ApJ...673L..79N. doi:10.1086/527358.
  4. ↑ Adams, E. R.; et al. (2013). "Adaptive Optics Images. II. 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets". The Astronomical Journal. 146 (1). 9. arXiv:1305.6548Freely accessible. Bibcode:2013AJ....146....9A. doi:10.1088/0004-6256/146/1/9.

Coordinates: 23h 39m 05.8061s, +42° 27′ 57.513″

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