WASP-12

WASP-12
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Auriga
Right ascension	06h 30m 32.7967s
Declination	+29° 40′ 20.2663″
Apparent magnitude (V)	11.560±0.068
Characteristics
Spectral type	G0V or F[citation needed]
Apparent magnitude (B)	12.138±0.019
Apparent magnitude (R)	~11.6
Apparent magnitude (J)	10.477±0.021
Apparent magnitude (H)	10.228±0.022
Apparent magnitude (K)	10.188±0.020
Astrometry
Proper motion (μ)	RA: −1.580±0.068 mas/yr ; Dec.: −6.958±0.058 mas/yr
Parallax (π)	2.3122 ± 0.0325 mas
Distance	1,410 ± 20 ly ; (432 ± 6 pc)
Details
Mass	1.35±0.14[citation needed] M☉
Radius	1.57±0.07[citation needed] R☉
Temperature	6300+200; −100[citation needed] K
Metallicity	+0.3+0.05; −0.15[citation needed]
Other designations
	TYC 1891-1178-1, 2MASS J06303279+2940202, UCAC2 42216354, Gaia DR2 3435282862461427072
Database references
SIMBAD	data
Extrasolar Planets; Encyclopaedia	data

WASP-12 is a magnitude 11 yellow dwarf star located approximately 1410 light-years away in the constellation Auriga.^[4] WASP-12 has a mass and radius similar to the Sun. Its planet WASP-12b has a retrograde orbit around WASP-12. Two red dwarf companions have been detected around WASP-12. Both have spectral types of M3V and are only 38% and 37% as massive as the Sun, respectively.^[6]

Planetary system[]

In 2008, the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method.^[7] Its high carbon-to-oxygen ratio indicates that rocky planets that might have formed in the star system; it may be a carbon planet.^[8] It is subject to intensive photo-evaporation, and may be completely destroyed within one billion years from now.^[9]

No indications of other planets in system was found as in 2015.^[10]

WASP-12b.
WASP-12b.
Artist's conception of WASP-12 & WASP-12b

The WASP-12 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.41±0.1 M_J	0.0229±0.0008	1.091423±0.000003	0.049±0.015	86.0±3.0^[11]°	1.736±0.092^[11] R_J

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
^ Jump up to: ^a ^b ^c ^d ^e 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.
^ Jump up to: ^a ^b Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry
^ Jump up to: ^a ^b ^c "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
^ Jump up to: ^a ^b ^c Skrutskie, M. F.; et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.Vizier catalog entry
^ Bechter, Eric B.; Crepp, Justin R.; Ngo, Henry; Knutson, Heather A.; Batygin, Konstantin; Hinkley, Sasha; Muirhead, Philip S.; Johnson, John Asher; Howard, Andrew W.; Montet, Benjamin T.; Matthews, Christopher T.; Morton, Timothy D. (2014). "WASP-12b AND HAT-P-8b ARE MEMBERS OF TRIPLE STAR SYSTEMS". The Astrophysical Journal. 788 (1): 2. arXiv:1307.6857. Bibcode:2014ApJ...788....2B. doi:10.1088/0004-637X/788/1/2. S2CID 36306243.
^ Hebb; Collier-Cameron, A.; Loeillet, B.; Pollacco, D.; Hébrard, G.; Street, R. A.; Bouchy, F.; Stempels, H. C.; et al. (2009). "WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED". The Astrophysical Journal. 693 (2): 1920–1928. arXiv:0812.3240. Bibcode:2009ApJ...693.1920H. doi:10.1088/0004-637X/693/2/1920. S2CID 14526064.
^ Madhusudhan, Nikku; Harrington, Joseph; Stevenson, Kevin B.; Nymeyer, Sarah; Campo, Christopher J.; Wheatley, Peter J.; Deming, Drake; Blecic, Jasmina; et al. (December 8, 2010). "A high C/O ratio and weak thermal inversion in the atmosphere of exoplanet WASP-12b". Nature. 469 (7328): 64–7. arXiv:1012.1603. Bibcode:2011Natur.469...64M. doi:10.1038/nature09602. PMID 21150901. S2CID 4415171..
^ D. Ehrenreich and J.-M. Désert, "Mass-loss rates for transiting exoplanets", 2011
^ Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS". The Astronomical Journal. 153 (2): 78. arXiv:1512.00464. doi:10.3847/1538-3881/153/2/78. S2CID 55191644.
^ Jump up to: ^a ^b Staff (2015). "Planet WASP-12 b". exoplanet.eu. Retrieved 4 August 2017.

External links[]

WASP-12b in transit (lightcurve)
"WASP-12". Exoplanets. Retrieved 2009-05-06.

Coordinates: 06^h 30^m 32.794^s, +29° 40′ 20.29″

[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] Jump up to: ^a ^b ^c ^d ^e 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.

[APASS_DR9-3] Jump up to: ^a ^b Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry

[SIMBAD-4] Jump up to: ^a ^b ^c "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.

[Skrutskie2006-5] Jump up to: ^a ^b ^c Skrutskie, M. F.; et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.Vizier catalog entry

[6] Bechter, Eric B.; Crepp, Justin R.; Ngo, Henry; Knutson, Heather A.; Batygin, Konstantin; Hinkley, Sasha; Muirhead, Philip S.; Johnson, John Asher; Howard, Andrew W.; Montet, Benjamin T.; Matthews, Christopher T.; Morton, Timothy D. (2014). "WASP-12b AND HAT-P-8b ARE MEMBERS OF TRIPLE STAR SYSTEMS". The Astrophysical Journal. 788 (1): 2. arXiv:1307.6857. Bibcode:2014ApJ...788....2B. doi:10.1088/0004-637X/788/1/2. S2CID 36306243.

[oasis-7] Hebb; Collier-Cameron, A.; Loeillet, B.; Pollacco, D.; Hébrard, G.; Street, R. A.; Bouchy, F.; Stempels, H. C.; et al. (2009). "WASP-12b: THE HOTTEST TRANSITING EXTRASOLAR PLANET YET DISCOVERED". The Astrophysical Journal. 693 (2): 1920–1928. arXiv:0812.3240. Bibcode:2009ApJ...693.1920H. doi:10.1088/0004-637X/693/2/1920. S2CID 14526064.

[8] Madhusudhan, Nikku; Harrington, Joseph; Stevenson, Kevin B.; Nymeyer, Sarah; Campo, Christopher J.; Wheatley, Peter J.; Deming, Drake; Blecic, Jasmina; et al. (December 8, 2010). "A high C/O ratio and weak thermal inversion in the atmosphere of exoplanet WASP-12b". Nature. 469 (7328): 64–7. arXiv:1012.1603. Bibcode:2011Natur.469...64M. doi:10.1038/nature09602. PMID 21150901. S2CID 4415171..

[9] D. Ehrenreich and J.-M. Désert, "Mass-loss rates for transiting exoplanets", 2011

[10] Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS". The Astronomical Journal. 153 (2): 78. arXiv:1512.00464. doi:10.3847/1538-3881/153/2/78. S2CID 55191644.

[EXO-2015-11] Jump up to: ^a ^b Staff (2015). "Planet WASP-12 b". exoplanet.eu. Retrieved 4 August 2017.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Auriga^[1]
Right ascension	06^h 30^m 32.7967^s^[2]
Declination	+29° 40′ 20.2663″^[2]
Apparent magnitude (V)	11.560±0.068^[3]
Characteristics
Spectral type	G0V or F^{[citation needed]}
Apparent magnitude (B)	12.138±0.019^[3]
Apparent magnitude (R)	~11.6^[4]
Apparent magnitude (J)	10.477±0.021^[5]
Apparent magnitude (H)	10.228±0.022^[5]
Apparent magnitude (K)	10.188±0.020^[5]
Astrometry

Proper motion (μ)	RA: −1.580±0.068^[2] mas/yr Dec.: −6.958±0.058^[2] mas/yr
Parallax (π)	2.3122 ± 0.0325^[2] mas
Distance	1,410 ± 20 ly (432 ± 6 pc)

Details

Mass	1.35±0.14^{[citation needed]} `M`_☉
Radius	1.57±0.07^{[citation needed]} `R`_☉
Temperature	6300+200 −100^{[citation needed]} K
Metallicity	+0.3+0.05 −0.15^{[citation needed]}

Other designations
TYC 1891-1178-1, 2MASS J06303279+2940202, UCAC2 42216354, Gaia DR2 3435282862461427072^[4]
Database references
SIMBAD	data
Extrasolar Planets Encyclopaedia	data

WASP-12

Contents

Planetary system[]

See also[]

References[]

External links[]