Star in the constellation Andromeda
WASP-1 is amagnitude 12binary star system located about 1,250light-years away[ 2] Andromeda constellation .[ 7] metal-rich F-type main-sequence star , named WASP-1A, and a distant low-mass star, named WASP-1B. WASP-1A has one knowntransiting hot Jupiter exoplanet namedWASP-1b .
WASP-1A has a distant companion star, named WASP-1B. WASP-1B is a low-mass star that is around 0.3 times as massive as the Sun and has an effective temperature of about[ 6] : 24 angular separation of about 4.6 arcseconds , corresponding to a projected distance of 1587 AU.[ 6] : 13, 15 proper motion of WASP-1A, indicating the two stars are gravitationally bound to each other.[ 6] : 15
In 2006, anextrasolar planet was discovered by theWide Angle Search for Planets team using thetransit method .[ 4] 3 , making it about half as dense as Saturn, and one third as dense as water. The orbit ofWASP-1b is inclined to the rotational axis of the star by 79.0+4.3 −4.5 [ 8]
Two searches for additional planets usingtransit-timing variations have yielded negative results.[ 9] [ 10]
^ Roman, Nancy G. (1987)."Identification of a constellation from a position" .Publications of the Astronomical Society of the Pacific 99 (617): 695.Bibcode :1987PASP...99..695R .doi :10.1086/132034 Constellation record for this object atVizieR .^a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties" .Astronomy and Astrophysics .674 : A1.arXiv :2208.00211 Bibcode :2023A&A...674A...1G .doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source atVizieR .^a b c d Torres, Guillermo; Winn, Joshua N.; Holman, Matthew J. (2008). "Improved Parameters for Extrasolar Transiting Planets".The Astrophysical Journal .677 (2):1324– 1342.arXiv :0801.1841 Bibcode :2008ApJ...677.1324T .doi :10.1086/529429 .S2CID 12899134 . ^a b 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 . ^a b "TYC 2265-107-1" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2009-05-20 .^a b c d e f g h i Ngo, Henry; Knutson, Heather A.; Hinkley, Sasha; Crepp, Justin R.; Bechter, Eric B.; Batygin, Konstantin; et al. (February 2015)."Friends of Hot Jupiters. II. No Correspondence between Hot-jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions" .The Astrophysical Journal .800 (2): 22.arXiv :1501.00013 Bibcode :2015ApJ...800..138N .doi :10.1088/0004-637X/800/2/138 ^ Stempels, H. C.; et al. (2007)."WASP-1: a lithium- and metal-rich star with an oversized planet" .Monthly Notices of the Royal Astronomical Society .379 (2):773– 778.arXiv :0705.1677 Bibcode :2007MNRAS.379..773S .doi :10.1111/j.1365-2966.2007.11976.x S2CID 17565024 . ^ 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-McLaughlin 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 . ^ Granata, V.; et al. (2014). "TASTE IV: Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b".Astronomische Nachrichten .335 (8):797– 803.arXiv :1405.3288 Bibcode :2014AN....335..797G .doi :10.1002/asna.201412072 .S2CID 118341059 . ^ Maciejewski, G.; et al. (2014)."Revisiting Parameters for the WASP-1 Planetary System" (PDF) .Acta Astronomica .64 (1):11– 26.arXiv :1402.6518 Bibcode :2014AcA....64...27M . ^ Bonomo, A. S.; et al. (2017)."The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets" .Astronomy and Astrophysics .602 . A107.arXiv :1704.00373 Bibcode :2017A&A...602A.107B .doi :10.1051/0004-6361/201629882 .S2CID 118923163 .
