WASP-8b

WASP-8b is an extrasolar planet discovered (with their stars) in the SuperWASP batch -6b to -15b. On 1 April 2008, Dr. Don Pollacco of Queen's University Belfast announced them at the RAS National Astronomy Meeting (NAM 2008).[3]

WASP-8b
Size comparison of WASP-8b with Jupiter.
Discovery
Discovered byCameron et al. (SuperWASP)
Discovery dateApril 1, 2008
Transit
Orbital characteristics
0.0793 AU (11,860,000 km)
8.16 d
StarWASP-8
Physical characteristics
Mean radius
1.17 RJ
Mass2.23 MJ
Mean density
1.85 g/cm3 (0.067 lb/cu in)[1]
4.30 g
Temperature950 (varies)[2]

    This system is located 89 parsecs away, which is closer than most Hot Jupiters. It is denser than Jupiter.

    The planet orbits retrograde to the spin of the parent star,[4][5] spin-orbit angle been equal to -123+3.4
    −4.4    °.[6]

    The equilibrium temperature is 950 K, but this oscillates due to eccentricity.[2]

    See also

    References
    1. Density is calculated from the mass and the radius, assuming a circular disc of eclipse relative to the Earth.
    2. Patricio Cubillos et al., "The Characterization of the Cool and Eccentric Exoplanet WASP-8b with Spitzer" in DPS Annual Meeting session "103.Extrasolar Planets: Atmospheric Chemistry and Characterization" (Monday, Oct 15, 2012, 11:40 AM -11:50 AM).
    3. "THE (SUPER)WASP FACTORY FINDS 10 NEW PLANETS IN THE LAST 6 MONTHS". 2008. Retrieved 2009-05-13.
    4. European Southern Observatory. "Artist's impression of an exoplanet WASP 8b in a retrograde orbit".
    5. Didier Queloz; et al. (2010). "WASP-8b: a retrograde transiting planet in a multiple system". Astronomy and Astrophysics. 517: L1. arXiv:1006.5089. Bibcode:2010A&A...517L...1Q. doi:10.1051/0004-6361/201014768.
    6. Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105

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