Jump to content

WASP-12

Coordinates: Sky map 06h 30m 32.794s, +29° 40′ 20.29″
From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Drbogdan (talk | contribs) at 12:40, 4 August 2017 (upd/adj data). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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) 12.14±0.021[1]
Apparent magnitude (V) 11.57 ±0.016[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
Distance871 ly
(267 pc)
Details
Mass1.35 ± 0.14 M☉
Radius1.57 ± 0.07 R☉
Temperature6300 −100+200 K
Metallicity0.3 −0.15+0.05
Other designations
2MASS J06303279+2940202, UCAC2 42216354[1]
Database references
SIMBADdata

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. 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.[2]

Planetary system

In 2008, the extrasolar planet WASP-12b was discovered orbiting WASP-12 by the transit method.[3] 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.[4]

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

See also

References

  1. ^ a b c d e f g h i j k l "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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..


Stub icon

This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=WASP-12&oldid=793867317"