WASP-12
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 30m 32.794s[1] |
| Declination | +29° 40′ 20.29″[1] |
| Apparent magnitude (V) | +11.69 |
| Characteristics | |
| Spectral type | G0 |
| Apparent magnitude (B) | ~12.1[1] |
| Apparent magnitude (R) | ~11.6[1] |
| Apparent magnitude (J) | 10.477 ±0.021[1] |
| Apparent magnitude (H) | 10.228 ±0.022[1] |
| Apparent magnitude (K) | 10.188 ±0.020[1] |
| Astrometry | |
| Proper motion (μ) | RA: -0.7[1] mas/yr Dec.: -7.8[1] mas/yr |
| Distance | 871 ly (267 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[1]
|
|
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
WASP-12 is a magnitude 11 yellow dwarf star located approximately 800 light-years away in the constellation Auriga.[1] WASP-12 has a mass and radius similar to the Sun
Contents |
[edit] Planetary system
In 2008 the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method.[2] The high carbon-to-oxygen ratio discovered for "b" indicate that rocky planets that might have formed in the star system could be carbon planets.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| WASP-12b | 1.41 ±0.1 MJ | 0.0229 ±0.0008 | 1.091423 ± 3e-06 | 0.049 ±0.015 |
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[edit] See also
[edit] References
- ^ a b c d e f g h i j k "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=WASP-12. Retrieved 2009-04-24.
- ^ Hebb et al.; 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. Bibcode 2009ApJ...693.1920H. doi:10.1088/0004-637X/693/2/1920. http://www.iop.org/EJ/abstract/0004-637X/693/2/1920.
- ^ Madhusudhan, Nikku; et al, Joseph; Stevenson, Kevin B.; Nymeyer, Sarah; Campo, Christopher J.; Wheatley, Peter J.; Deming, Drake; Blecic, Jasmina et al (2010, December 8). "A high C/O ratio and weak thermal inversion in the atmosphere of exoplanet WASP-12b". Nature 469 (7328): 64. arXiv:1012.1603. Bibcode 2011Natur.469...64M. doi:10.1038/nature09602. PMID 21150901.
[edit] External links
- WASP-12b in transit (lightcurve)
- "WASP-12". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=WASP-12. Retrieved 2009-05-06.
Coordinates: 
06h 30m 32.794s, +29° 40′ 20.29″
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