HAT-P-12
Appearance
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canes Venatici[1] |
Right ascension | 13h 57m 33.4669s[2] |
Declination | +43° 29′ 36.6025″[2] |
Apparent magnitude (V) | 12.84 |
Characteristics | |
Spectral type | K5[3] |
Apparent magnitude (J) | 10.794 ±0.023[4] |
Apparent magnitude (H) | 10.236 ±0.022[4] |
Apparent magnitude (K) | 10.108 ±0.016[4] |
Astrometry | |
Radial velocity (Rv) | −40.4589±0.0023[5] km/s |
Proper motion (μ) | RA: −134.791±0.030[2] mas/yr Dec.: −44.294±0.035[2] mas/yr |
Parallax (π) | 6.9763 ± 0.0220 mas[2] |
Distance | 468 ± 1 ly (143.3 ± 0.5 pc) |
Absolute magnitude (MV) | 12.35 ± 0.23 |
Details | |
Mass | 0.73 ± 0.02[3] M☉ |
Radius | 0.70 (+0.02 −0.01)[3] R☉ |
Luminosity | 0.21 (+0.02 −0.01)[3] L☉ |
Temperature | 4650 ± 60[3] K |
Metallicity [Fe/H] | −0.29 ± 0.05[3] dex |
Rotation | 0.5 ± 0.4 kms−1[3] |
Age | 2.5 ± 2.0[3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
HAT-P-12 is a magnitude 13 Metal-Poor K Dwarf star approximately 468 light years away in the constellation Canes Venatici.[3][2]
Planetary system
In 2009 an exoplanet, HAT-P-12b, was discovered by the HATNet Project orbiting this star. The planet was discovered using the transit method and confirmed by follow up radial velocity measurements.[3] Transit-timing variations suggest the possible presence of additional non-transiting planets in the system.[6]
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 | — | 0.95+2.85 −0.02 RJ |
c[6] (unconfirmed) | 0.218 MJ | — | 8.853 | 0.15499 | 73.5° | — |
See also
References
- ^ 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
- ^ a b c d e f 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.
- ^ a b c d e f g h i j k 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. S2CID 14540643.
- ^ a b c d "HAT-P-12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-19.
- ^ Mancini, L.; et al. (2018). "The GAPS programme with HARPS-N at TNG. XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60". Astronomy and Astrophysics. 613. Table C.2. arXiv:1802.03859. Bibcode:2018A&A...613A..41M. doi:10.1051/0004-6361/201732234.
- ^ a b Non-Sinusoidal Transit Timing Variations for the Exoplanet HAT-P-12b, 2020, arXiv:2012.08820
External links
- "HAT-P-12". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-18.