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WASP-1b

Size comparison of WASP-1b with Jupiter
Discovery
Discovered by	Cameron et al. (SuperWASP and SOPHIE)  South Africa and  France
Discovery site	SAAO
Discovery date	September 25, 2006
Detection method	Transit
Orbital characteristics
Semi-major axis	0.0382 (± 0.0013) AU
Eccentricity	0
Orbital period (sidereal)	2.5199464 (± 8e-07) d
Inclination	88.65 (± 0.55)
Star	WASP-1
Physical characteristics
Mean radius	1.484 −0.09 RJ
Mass	0.86 ± 0.07 MJ
Mean density	0.476 g/cm
Surface gravity	12.5 m/s (41 ft/s) 1.27 g
Temperature	1,800 K

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

Orbit and mass

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.

In 2018, it was discovered via observations of the Rossiter-McLaughlin effect that the orbit of WASP-1b is strongly misaligned with rotational axis of the star by 79.0
_−4.5 degrees, making it a nearly "polar" orbit.

See also

• HD 209458 b
• WASP-2b

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

• Charbonneau, David; Winn, Joshua N.; Everett, Mark E.; Latham, David W.; Holman, Matthew J.; Esquerdo, Gilbert A.; o’Donovan, Francis T. (2007). "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.
• Shporer, A.; Tamuz, O.; Zucker, S.; Mazeh, T. (2007). "Photometric follow-up of the transiting planet around WASP-1". Monthly Notices of the Royal Astronomical Society. 376 (3): 1296–1300. arXiv:astro-ph/0610556. Bibcode:2007MNRAS.376.1296S. doi:10.1111/j.1365-2966.2007.11537.x. S2CID 12694181.

External links

Media related to WASP-1b at Wikimedia Commons

• "Planet WASP-1 b". Extrasolar Planets Encyclopaedia. Retrieved 2018-11-07.
• BBC News article
• WASP Planets

v t e Constellation of Andromeda
Adhil Andromeda in Chinese astronomy List of Andromeda's satellite galaxies List of stars in Andromeda
Stars	Bayer α (Alpheratz) β (Mirach) γ (Almach) δ ε ζ η θ ι κ λ μ ν ξ (Adhil) ο π ρ σ τ υ (Titawin) φ χ ψ ω A b c υ Per (Nembus) Flamsteed 2 3 4 5 6 7 8 9 10 11 12 13 14 (Veritate) 15 18 22 23 26 28 32 36 39 41 44 45 47 55 56 58 59 63 64 65 66 6 Per Variable R T U W Z RT RV RX SU SW TU TW WZ XZ AB AC AD AE AF AR BM BX CC CG CN DS DX EG ET EU FF GO GP GQ GX GR GY HH HN IW KK KX KZ LL LN LP LQ OP OS OU PX PY QR QV QX V385 V428 V439 V455 V529 V807 HR 1 40 56 78 104 122 134 178 275 282 283 289 379 410 483 687 746 748 8884 8925 8950 8962 8973 9011 9074 9075 9105 HD 16175 (Buna) 222155 Other 3XMM J004232.1+411314 ADS 48 HAT-P-6 (Sterrennacht) HAT-P-16 HAT-P-19 HAT-P-28 M31-RV KELT-1 NGC 44 NGC 82 NGC 84 NGC 91 NGC 162 NGC 464 Qatar-3 Qatar-4 Qatar-5 PA-99-N2 WASP-1 WISE 0146+4234 WISE J0005+3737 WISE J004945.61+215120.0
Exoplanets 14 Andromedae b κ Andromedae b υ Andromedae b c d Gliese 15 Ab c HD 13931 b HD 16175 b HAT-P-6b HAT-P-32b WASP-1b WASP-33b Qatar-4b Qatar-5b
Star clusters	NGC 206 272 752 956 7686 Other Mayall II RBC EXT8
Nebulae	NGC 7662
Galaxies	Messier 32 110 NGC 5 11 13 19 20 21 27 39 43 48 49 51 67 68 69 70 71 72 74 76 79 80 81 83 85 86 90 93 94 96 97 108 109 112 140 149 160 169 181 183 184 214 218 226 228 229 233 243 252 258 260 262 280 304 317 389 393 404 425 431 477 512 513 523 528 529 531 536 542 561 605 620 668 679 687 700 703 704 705 708 709 710 712 714 717 721 732 753 759 801 812 834 891 906 910 911 912 913 920 937 980 995 996 999 1000 7640 7836 Numbered I II III IV V VIII IX X XI XVIII XIX XXI Other 3C 66A 3C 66B Andromeda Galaxy Arp 273 Donatiello I UGC 1840
Galaxy clusters Abell 262 NGC 68 group
Astronomical events GRB 101225A SN 1885A (S)
Category

• Exoplanets discovered by WASP
• Exoplanets discovered in 2006
• Giant planets
• Hot Jupiters
• Transiting exoplanets
• Andromeda (constellation)