WASP-2b
From Wikipedia, the free encyclopedia
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | WASP-2 | |
| Constellation | Delphinus | |
| Right ascension | (α) | 20h 30m 54s |
| Declination | (δ) | +06° 25′ 46″ |
| Distance | 493 ly (151 pc) | |
| Spectral type | K1V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.0307 ± 0.0011 AU |
| Orbital period | (P) | 2.152226 ± 0.00004 d |
| Inclination | (i) | 87 ± 3° |
| Time of periastron | (T0) | 2453991.5146 ± 0.001 JD |
| Physical characteristics | ||
| Mass | (m) | 0.88 ± 0.11 MJ |
| Radius | (r) | 1.04 ± 0.06 RJ |
| Density | (ρ) | 1038 kg/m3 |
| Surface gravity | (g) | 1.92 g |
| Temperature | (T) | 2200 ± 200 K |
| Discovery information | ||
| Discovery date | September 25, 2006 | |
| Discoverer(s) | Cameron et al. (SuperWASP) | |
| Detection method | Transit | |
| Discovery site | South Africa | |
| Discovery status | Published | |
WASP-2b is an extrasolar planet orbiting the star WASP-2 located about 500 light years away in the constellation Delphinus. The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. Unlike Jupiter, but similar to many other planets detected around other stars, WASP-2b is located very close to its star, and belongs to the class of planets known as hot Jupiters.
[edit] See also
[edit] References
- Cameron et al. (2007). "WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE". Monthly Notices of the Royal Astronomical Society 375: 951–957. doi:. (web Preprint)
- David Charbonneau, Joshua N. Winn, Mark E. Everett, David W. Latham, Matthew J. Holman, Gilbert A. Esquerdo, Francis T. O'Donovan (2006-10-19). "Precise Radius Estimates for the Exoplanets WASP-1b and WASP-2b". 1. Retrieved on 2007-01-17.
