HAT-P-12
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HAT-P-12 |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 57m 33.47s[1] |
| Declination | +43° 29′ 36.8″[1] |
| Apparent magnitude (V) | 12.84 |
| Characteristics | |
| Spectral type | K[2] |
| Apparent magnitude (J) | 10.794 ±0.023[1] |
| Apparent magnitude (H) | 10.236 ±0.022[1] |
| Apparent magnitude (K) | 10.108 ±0.016[1] |
| Astrometry | |
| Proper motion (μ) | RA: -132 ± 2[1] mas/yr Dec.: -38 ± 1[1] mas/yr |
| Distance | 464.77 (+13.7 −10.8) ly (142.5 (+4.2 −3.3) pc) |
| Absolute magnitude (MV) | 12.35 ± 0.23 |
| Details | |
| Mass | 0.73 ± 0.02[2] M☉ |
| Radius | 0.70 (+0.02 −0.01)[2] R☉ |
| Luminosity | 0.21 (+0.02 −0.01)[2] L☉ |
| Temperature | 4650 ± 60[2] K |
| Metallicity | −0.29 ± 0.05[2] |
| Rotation | 0.5 ± 0.4 kms−1[2] |
| Age | (2.5 ± 2.0) × 109[2] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia |
data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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HAT-P-12 is a magnitude 13 star approximately 465 light years away in the constellation Canes Venatici.[1]
Contents |
Planetary system [edit]
An exoplanet, HAT-P-12b, was discovered orbiting the star by the transit method in 2009.[2]
| 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 [edit]
References [edit]
- ^ a b c d e f g h "SIMBAD query result: NAME HAT-P-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-18.
- ^ a b c d e f g h i j 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. arXiv:0904.4704. Bibcode:2009ApJ...706..785H. doi:10.1088/0004-637X/706/1/785.
External links [edit]
- "HAT-P-12". Exoplanets. Retrieved 2009-05-18.
Coordinates: 
13h 57m 33s, +43° 29′ 37″
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