WASP-12

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WASP-12
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.

Planetary system[edit]

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 a carbon planet.[3]

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 MJ 0.0229 ±0.0008 1.091423 ± 3e-06 0.049 ±0.015
Artist's conception of WASP-12 & WASP-12b

See also[edit]

References[edit]

  1. ^ a b c d e f g h i j k "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24. 
  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. 
  3. ^ 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. .

External links[edit]

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