WASP-8b
 Size comparison of WASP-8b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery date | April 1, 2008 |
| Transit | |
| Orbital characteristics | |
| 0.0793 AU (11,860,000 km) | |
| 8.16 d | |
| Star | WASP-8 |
| Physical characteristics | |
| 1.17 RJ | |
| Mass | 2.23 MJ |
Mean density | 1.85 g/cm3 (0.067 lb/cu in)[1] |
| 4.30 g | |
| Temperature | 950 (varies)[2] |
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]
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
- ^ Density is calculated from the mass and the radius, assuming a circular disc of eclipse relative to the Earth.
- ^ a b 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).
- ^ "THE (SUPER)WASP FACTORY FINDS 10 NEW PLANETS IN THE LAST 6 MONTHS". 2008. Retrieved 2009-05-13.
- ^ European Southern Observatory. "Artist's impression of an exoplanet WASP 8b in a retrograde orbit".
- ^ 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.
- ^ Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
External links
Media related to WASP-8b at Wikimedia Commons
