HAT-P-9

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HAT-P-9
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 07h 20m 40.454s[1]
Declination +37° 08′ 26.35″[1]
Apparent magnitude (V) 12.34 ± 0.27[2]
Characteristics
Spectral type F[3]
Apparent magnitude (B) 12.35 ± 0.23[2]
Apparent magnitude (V) 12.34 ± 0.27[2]
Apparent magnitude (J) 11.274 ± 0.022[2]
Apparent magnitude (H) 11.04 ± 0.03[2]
Apparent magnitude (K) 11.015 ± 0.021[2]
Astrometry
Proper motion (μ) RA: –14.3 ± 0.7[1] mas/yr
Dec.: –11.1 ± 0.9[1] mas/yr
Distance 1564,8 ± 195,6 ly
(480 ± 60 pc)
Details
Mass 1.28 ± 0.13[3] M
Radius 1.32 ± 0.07[3] R
Surface gravity (log g) 4.29 ± 0.03[4] cgs
Temperature 6253 ± 84[4] K
Metallicity [Fe/H] 0.16 ± 0.09[4] dex
Rotational velocity (v sin i) 13.4 ± 1.4[4] km/s
Age 1.6 +1.8
−1.4
 Gyr
Equatorial [ g ] 201,21 m/s2
Other designations
TYC 2463-281-1, HAT-P 9, SDSS J072040.44+370826.3, GSC 02463-00281, 2MASS J07204044+3708263, UCAC2 44825174.
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HAT-P-9 is a magnitude 12 F star approximately 1560 light years away in the constellation Auriga.[2] A search for a binary companion star using adaptive optics at the MMT Observatory was negative.[5]

Planetary system[edit]

An exoplanet orbiting the star, HAT-P-9b, was discovered by the transit method on June 26, 2008.[3]

The HAT-P-9 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 0.78 ± 0.09 MJ 0.053 ± 0.002 3.92289 ± 4e-05 0

See also[edit]

References[edit]

  1. ^ a b c d 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
  2. ^ a b c d e f g "SIMBAD query result: TYC 2463-281-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-18. 
  3. ^ a b c d Shporer, Avi et al. (2009). "HAT-P-9b: A Low-Density Planet Transiting a Moderately Faint F Star". The Astrophysical Journal 690 (2): 1393–1400. arXiv:0806.4008. Bibcode:2009ApJ...690.1393S. doi:10.1088/0004-637X/690/2/1393. 
  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. ^ 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:1305.6548. Bibcode:2013AJ....146....9A. doi:10.1088/0004-6256/146/1/9. 

External links[edit]

Coordinates: Sky map 07h 20m 40.479s, +37° 08′ 26.17″