Back واسب-2b Arabic WASP-2b Welsh WASP-2 b German WASP-2b Spanish WASP-2b ID WASP-2 b Italian WASP-2b Japanese WASP-2b Korean WASP-2 b LB WASP-2 b Lithuanian
 Size comparison of WASP-2b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery site | SAAO |
| Discovery date | September 25, 2006 |
| Transit | |
| Orbital characteristics | |
| 0.03138 (± 0.011) AU | |
| Eccentricity | 0 |
| 2.15222144 (± 4e-07) d | |
| Inclination | 84.73 (± 0.19) |
| Star | WASP-2 A[1] |
| Physical characteristics | |
| 1.079 ± 0.033 RJ | |
| Mass | 0.847 ± 0.045 MJ |
| 3.279 ± 0.036[1] g | |
| Temperature | 1253 K[2] |
WASP-2b is an extrasolar planet orbiting the star WASP-2 located about 500 light years away in the constellation of Delphinus. It was discovered via the transit method, and then follow up measurements using the radial velocity method confirmed that WASP-2b was a planet. 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.[3][4] A 2008 study concluded that the WASP-2b system (among others) is a binary star system allowing even more accurate determination of stellar and planetary parameters.[1]
- ^ a b c Daemgen; Hormuth, F.; Brandner, W.; Bergfors, C.; Janson, M.; Hippler, S.; Henning, T. (2009). "Binarity of transit host stars - Implications for planetary parameters" (PDF). Astronomy and Astrophysics. 498 (2): 567–574. arXiv:0902.2179. Bibcode:2009A&A...498..567D. doi:10.1051/0004-6361/200810988. S2CID 9893376.
- ^ Saeed, M. I.; Goderya, S. N.; Chishtie, F. A. (2020), Multi-color photometry and parameters estimation of Jupiter-sized exoplanets; TRES-3b, WASP-2b and HATP-30b, arXiv:2011.07169
- ^ Cite error: The named reference
Cameron2007was invoked but never defined (see the help page). - ^ Charbonneau; Winn, Joshua N.; Everett, Mark E.; Latham, David W.; Holman, Matthew J.; Esquerdo, Gilbert A.; O’donovan, Francis T. (2006). "Precise Radius Estimates for the Exoplanets WASP-1b and WASP-2b". The Astrophysical Journal. 658 (2): 1322–1327. arXiv:astro-ph/0610589. Bibcode:2007ApJ...658.1322C. doi:10.1086/512008. S2CID 14099767.