HAT-P-12

HAT-P-12
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici[1]
Right ascension 13h 57m 33.47s[2]
Declination +43° 29′ 36.8″[2]
Apparent magnitude (V) 12.84
Characteristics
Spectral type K5[3]
Apparent magnitude (J) 10.794 ±0.023[2]
Apparent magnitude (H) 10.236 ±0.022[2]
Apparent magnitude (K) 10.108 ±0.016[2]
Astrometry
Proper motion (μ) RA: -132 ± 2[2] mas/yr
Dec.: -38 ± 1[2] mas/yr
Distance464.77 (+13.7
−10.8) ly
(142.5 (+4.2
−3.3) pc)
Absolute magnitude (MV)12.35 ± 0.23
Details
Mass0.73 ± 0.02[3] M☉
Radius0.70 (+0.02
−0.01)[3] R☉
Luminosity0.21 (+0.02
−0.01)[3] L☉
Temperature4650 ± 60[3] K
Metallicity [Fe/H]−0.29 ± 0.05[3] dex
Rotation0.5 ± 0.4 kms−1[3]
Age2.5 ± 2.0[3] Gyr
Other designations
SDSS J135733.42+432936.5, GSC 03033-00706, 2MASS J13573347+4329367
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HAT-P-12 is a magnitude 13 star approximately 465 light years away in the constellation Canes Venatici.[2]

Planetary system

An exoplanet, HAT-P-12b, was discovered orbiting the star by the transit method in 2009.[3]

The HAT-P-12 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.211 ± 0.012 MJ 0.0384 ± 0.0003 3.2130598 ± 0.000006 0 — —

See also

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034.Vizier query form
  2. 1 2 3 4 5 6 7 8 "SIMBAD query result: NAME HAT-P-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-18.
  3. 1 2 3 4 5 6 7 8 9 10 Hartman, J. D.; et al. (2009). "HAT-P-12b: A Low-density sub-Saturn mass planet transiting a metal-poor K dwarf". The Astrophysical Journal. 706 (1): 785–796. Bibcode:2009ApJ...706..785H. arXiv:0904.4704 Freely accessible. doi:10.1088/0004-637X/706/1/785.

Coordinates: 13h 57m 33s, +43° 29′ 37″


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