WASP-2b
From Wikipedia, the free encyclopedia
| Extrasolar planet | Lists of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | WASP-2 | |
| Constellation | Delphinus | |
| Right ascension | (α) | 20h 30m 54s |
| Declination | (δ) | +06° 25′ 46″ |
| Spectral type | K1V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.0307 ± 0.0011 AU |
| Eccentricity | (e) | ? |
| Orbital period | (P) | 2.152226 ± 0.00004 d |
| Inclination | (i) | 87 ± 3° |
| Longitude of periastron |
(ω) | ?° |
| Time of periastron | (τ) | ? JD |
| Physical characteristics | ||
| Mass | (m) | 0.88 ± 0.11 MJ |
| Radius | (r) | 1.04 ± 0.06 RJ |
| Density | (ρ) | ? kg/m3 |
| Temperature | (T) | 5200 ± 200 K |
| Discovery information | ||
| Discovery date | 2006 | |
| Discoverer(s) | Cameron et al. (SuperWASP) | |
| Detection method | Transit | |
| 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
- A. Collier Cameron, F. Bouchy, G. Hebrard, P. Maxted, D. Pollacco, F. Pont, I. Skillen, B. Smalley, R. A. Street, R.G. West, D.M. Wilson, S. Aigrain, D.J. Christian, W.I. Clarkson, B. Enoch, A. Evans, A. Fitzsimmons, M. Gillon, C.A. Haswell, L. Hebb, C. Hellier, S.T. Hodgkin, K. Horne, J. Irwin, S.R. Kane, F.P. Keenan, B. Loeillet, T.A. Lister, M. Mayor, C. Moutou, A.J. Norton, J. Osborne, N. Parley, D. Queloz, R. Ryans, A.H.M.J. Triaud, S. Udry, P.J. Wheatley (2006-09-25). "WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE". 1. Retrieved on 2006-10-07.
- 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.
