WASP-12
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Auriga |
Right ascension | 06h 30m 32.7943s[1] |
Declination | +29° 40′ 20.287″[1] |
Apparent magnitude (V) | +11.69 |
Characteristics | |
Spectral type | G0 |
Apparent magnitude (B) | 12.14±0.021[2] |
Apparent magnitude (V) | 11.57 ±0.016[2] |
Apparent magnitude (R) | ~11.6[2] |
Apparent magnitude (J) | 10.477 ±0.021[2] |
Apparent magnitude (H) | 10.228 ±0.022[2] |
Apparent magnitude (K) | 10.188 ±0.020[2] |
Astrometry | |
Proper motion (μ) | RA: ±1.908 0.432[1] mas/yr Dec.: ±1.918 −8.283[1] mas/yr |
Parallax (π) | 2.58 ± 0.27[1] mas |
Distance | approx. 1,300 ly (approx. 390 pc) |
Details | |
Mass | 1.35 ± 0.14 M☉ |
Radius | 1.57 ± 0.07 R☉ |
Temperature | 6300 −100+200 K |
Metallicity | 0.3 −0.15+0.05 |
Other designations | |
2MASS J06303279+2940202, UCAC2 42216354[2] | |
Database references | |
SIMBAD | data |
Extrasolar Planets Encyclopaedia | data |
WASP-12 is a magnitude 11 yellow dwarf star located approximately 1300 light-years away in the constellation Auriga.[2] 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.[3]
Planetary system
In 2008, the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method.[4] Its high carbon-to-oxygen ratio indicates that rocky planets that might have formed in the star system; it may be a carbon planet.[5]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.41 ±0.1 MJ | 0.0229 ±0.0008 | 1.091423 ± 3e-06 | 0.049 ±0.015 | 86.0 ± 3.0[6]° | 1.736 ± 0.092[6] RJ |
- WASP-12b.
- WASP-12b.
- Artist's conception of WASP-12 & WASP-12b
See also
References
- 1 2 3 4 5 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
- 1 2 3 4 5 6 7 8 "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
- ↑ 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: 2. arXiv:1307.6857. Bibcode:2014ApJ...788....2B. doi:10.1088/0004-637X/788/1/2.
- ↑ 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.
- ↑ 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. .
- 1 2 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.
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