HAT-P-12

HAT-P-12
Observation data; Epoch J2000 Equinox J2000
Constellation	Canes Venatici
Right ascension	13h 57m 33.4669s
Declination	+43° 29′ 36.6025″
Apparent magnitude (V)	12.84
Characteristics
Spectral type	K5
Apparent magnitude (J)	10.794 ±0.023
Apparent magnitude (H)	10.236 ±0.022
Apparent magnitude (K)	10.108 ±0.016
Astrometry
Radial velocity (Rv)	−40.4589±0.0023 km/s
Proper motion (μ)	RA: −134.791±0.030 mas/yr ; Dec.: −44.294±0.035 mas/yr
Parallax (π)	6.9763 ± 0.0220 mas
Distance	468 ± 1 ly ; (143.3 ± 0.5 pc)
Absolute magnitude (MV)	12.35 ± 0.23
Details
Mass	0.719±0.016 M☉
Radius	0.7084±0.0095 R☉
Luminosity	0.21+0.02; −0.01 L☉
Surface gravity (log g)	4.594±0.013 cgs
Temperature	4710±49 K
Metallicity [Fe/H]	−0.24+0.055; −0.062 dex
Rotation	0.5 ± 0.4 kms−1
Age	2.5 ± 2.0 Gyr
Other designations
	Gaia DR2 1499514786891168640, GSC 03033-00706, 2MASS J13573347+4329367, SDSS J135733.42+432936.5
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets; Encyclopaedia	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.^[7]

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 M_J	0.0384 ± 0.0003	3.2130598 ± 0.000006	0	—	0.95^+2.85 _−0.02 R_J
^[7] (unconfirmed)	0.218 M_J	—	8.853	0.15499	73.5°	—

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 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.
^ Wang, Xian-Yu; et al. (1 July 2021). "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves". The Astrophysical Journal Supplement Series. 255 (1). 15. arXiv:2105.14851. Bibcode:2021ApJS..255...15W. doi:10.3847/1538-4365/ac0835.
^ ^a ^b Sariya, Devesh P.; Jiang, Ing-Guey; Su, Li-Hsin; Yeh, Li-Chin; Chang, Tze-En; Moskvin, V. V.; Shlyapnikov, A. A.; Ignatov, V.; Mkrtichian, David; Griv, Evgeny; Mannaday, Vineet Kumar; Thakur, Parijat; Sahu, D. K.; Chand, Swadesh; Bisht, D.; Sun, Zhao; Ji, Jianghui (2021), "Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b", Research in Astronomy and Astrophysics, 21 (4): 097, arXiv:2012.08820, doi:10.1088/1674-4527/21/4/97, S2CID 229188086

External links[]

"HAT-P-12". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-18.

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

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[Roman1987-1] 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

[Gaia_DR2-2] ^ ^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.

[Hartman2009-3] ^ ^a ^b ^c ^d ^e ^f ^g 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.

[Simbad-4] "HAT-P-12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-19.

[Mancini2018-5] 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.

[Wang2021-6] Wang, Xian-Yu; et al. (1 July 2021). "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves". The Astrophysical Journal Supplement Series. 255 (1). 15. arXiv:2105.14851. Bibcode:2021ApJS..255...15W. doi:10.3847/1538-4365/ac0835.

[Sariya2020-7] Sariya, Devesh P.; Jiang, Ing-Guey; Su, Li-Hsin; Yeh, Li-Chin; Chang, Tze-En; Moskvin, V. V.; Shlyapnikov, A. A.; Ignatov, V.; Mkrtichian, David; Griv, Evgeny; Mannaday, Vineet Kumar; Thakur, Parijat; Sahu, D. K.; Chand, Swadesh; Bisht, D.; Sun, Zhao; Ji, Jianghui (2021), "Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b", Research in Astronomy and Astrophysics, 21 (4): 097, arXiv:2012.08820, doi:10.1088/1674-4527/21/4/97, S2CID 229188086

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[5]

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[7]

Observation data Epoch J2000 Equinox J2000
Constellation	Canes Venatici^[1]
Right ascension	13^h 57^m 33.4669^s^[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 (R_v)	−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^[2] mas
Distance	468 ± 1 ly (143.3 ± 0.5 pc)
Absolute magnitude (M_V)	12.35 ± 0.23

Details^[6]

Mass	0.719±0.016 `M`_☉
Radius	0.7084±0.0095 `R`_☉
Luminosity	0.21^+0.02 _−0.01^[3] `L`_☉
Surface gravity (log g)	4.594±0.013 cgs
Temperature	4710±49 K
Metallicity [Fe/H]	−0.24^+0.055 _−0.062 dex
Rotation	0.5 ± 0.4 kms⁻¹^[3]
Age	2.5 ± 2.0^[3] Gyr

Other designations
Gaia DR2 1499514786891168640, GSC 03033-00706, 2MASS J13573347+4329367, SDSS J135733.42+432936.5^[4]
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets Encyclopaedia	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

HAT-P-12

Contents

Planetary system[]

See also[]

References[]

External links[]