WASP-1b

WASP-1b is an extrasolar planet orbiting the star WASP-1 located 1,300 light-years away in the constellation Andromeda.

WASP-1b
Size comparison of WASP-1b with Jupiter
Discovery
Discovered byCameron et al. (SuperWASP
and SOPHIE)
 South Africa
and  France
Discovery siteSAAO
Discovery dateSeptember 25, 2006
Transit
Orbital characteristics
0.0382 (± 0.0013) AU
Eccentricity0
2.5199464 (± 8e-07) d
Inclination88.65 (± 0.55)
StarWASP-1
Physical characteristics
Mean radius
1.484 +0.06
−0.09 RJ
Mass0.86 ± 0.07 MJ
Mean density
476 kg/m3 (802 lb/cu yd)
12.5 m/s2 (41 ft/s2)
1.27 g
Temperature1,800 K

    Orbit and mass
    The radial velocity trend of WASP-1, caused by the presence of WASP-1 b

    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-1b is located very close to its star, and belongs to the class of planets known as hot Jupiters.

    WASP-1 b was discovered via the transit method by SuperWASP, for which the star and planet are named. Follow-up radial velocity measurements confirmed the presence of an unseen companion, and allowed for the mass of WASP-1 b to be determined.[1]

    In 2018, it was discovered by observation of Rossiter-McLaughlin effect what the orbit of WASP-1b is strongly misaligned with rotational axis of the star by 79.0+4.3
    −4.5     degrees, making it a nearly "polar" orbit.[2]

    See also

    References
    1. Cameron, A. Collier; 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 (3): 951–957. arXiv:astro-ph/0609688. Bibcode:2007MNRAS.375..951C. doi:10.1111/j.1365-2966.2006.11350.x. S2CID 735515.
    2. Simpson, E. K.; Pollacco, D.; Cameron, A. Collier; Hébrard, G.; Anderson, D. R.; Barros, S. C. C.; Boisse, I.; Bouchy, F.; Faedi, F.; Gillon, M.; Hebb, L.; Keenan, F. P.; Miller, G. R. M.; Moutou, C.; Queloz, D.; Skillen, I.; Sorensen, P.; Stempels, H. C.; Triaud, A.; Watson, C. A.; Wilson, P. A. (2011). "The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-Mc Laughlin observations★". Monthly Notices of the Royal Astronomical Society. 414 (4): 3023–3035. arXiv:1011.5664. Bibcode:2011MNRAS.414.3023S. doi:10.1111/j.1365-2966.2011.18603.x. S2CID 46522188.

    Further reading

    Media related to WASP-1b at Wikimedia Commons

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