Star in the constellation Lyra
WASP-3
Observation dataEpoch J2000.0 Equinox J2000.0
Constellation Lyra [ 2]
WASP-3A
Right ascension 18h 34m 31.6252s [ 3]
Declination +35° 39′ 41.492″[ 3]
Apparent magnitude (V)± 0.05[ 4]
WASP-3C
Right ascension 18h 34m 30.2553s [ 5] [ 6]
Declination +35° 39′ 34.004″[ 5] [ 6]
Characteristics
WASP-3A
Evolutionary stage
main-sequence star
Spectral type
F7V[ 4]
Apparent magnitude (B)
± 0.06[ 4]
Apparent magnitude (G)
± 0.0028[ 4] [ 6]
Apparent magnitude (J)
± 0.020[ 4]
Apparent magnitude (H)
± 0.014[ 4]
Apparent magnitude (K)
± 0.015[ 4]
Variable type
planetary transit [ 7]
WASP-3B
Apparent magnitude (J)
± 0.12[ 8]
Apparent magnitude (H)
± 0.079[ 8]
Apparent magnitude (K)
± 0.052[ 8]
Astrometry WASP-3A Radial velocity (Rv )± 0.007[ 9] km/s Proper motion (μ) RA: mas /yr [ 3] Dec.: mas /yr [ 3] Parallax (π)4.3338± 0.0120 mas [ 3] Distance 753 ± 2 ly pc ) Details WASP-3A Mass +0.06 [ 9] : 1581 M ☉ Radius ± 0.044[ 10] R ☉ Surface gravity (log g )+0.07 [ 9] : 1581 cgs Temperature ± 100[ 9] : 1581 K Metallicity ± 0.20[ 9] : 1581 Rotational velocity (v sin i )± 1.5[ 10] Age ± 1.2[ 10] Gyr WASP-3B Mass ± 0.006[ 8] : 14 M ☉ Surface gravity (log g )~5.22[ 8] : 13 cgs Temperature ~2900[ 8] : 13 K
Position (relative to WASP-3A) [ 8] : 11, 14
Component WASP-3B Epoch of observation 2012–2013 Angular distance ~1.19″ Position angle ~87.1° Projected separation ± 20AU
Position (relative to WASP-3A) [ 6]
Component WASP-3C Angular distance 92 ± 0.00002 ″ Position angle 72 ± 0.00006 Projected separation 4230 AU Other designations V838 Lyr , BD +35 3293TOI -2131TIC 27848472WASP -3TYC 2636-195-1GSC 02636-001952MASS J18343163+3539415USNO-B1.0 1256-00285133, 1SWASP J183431.62+353941.4[ 4] Database references SIMBAD data Exoplanet Archive data
WASP-3 is a triple star system located about 753 light-years (231 parsecs ) away from the Sun in the constellation Lyra . The system has an apparent magnitude of 10. The brightest and most massive star of this system is WASP-3A, an F-type main sequence star which has one known transiting hot Jupiter exoplanet , WASP-3b . Since the planet transits the star, the star is classified as a planetary transit variable and has received the variable star designation V838 Lyrae .[ 7]
Triple system
WASP-3 has been identified as a triple star system in a 2019 study of astrometry from the Gaia [ 11] : 5093 F-type main sequence star that is 1.24 times as massive as the Sun and 1.31 times as large as the Sun in radius.[ 9] : 1581 variable star ; observations between 2007 and 2010 show that the star's chromospheric activity had increased during that time period.[ 12] [ 8] : 11, 13 angular separation of approximately 1.19 arcseconds , corresponding to a projected separation distance of about AU [ 8] : 11, 13 [ 8] : 14 [ 11] : 5093 [ 6]
Planetary system
WASP-3A has one known transiting hot Jupiter extrasolar planet , WASP-3b , which was detected by the SuperWASP project in 2007.[ 9] William Herschel Telescope .
In 2010, researchers proposed a second planet orbiting WASP-3A due to transit timing variations in WASP-3b.[ 13] [ 14] [ 12]
See also
References
^ "MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved 11 April 2025 .^ 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 at VizieR .^ a b c d 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 at VizieR .^ a b c d e f g h "TYC 2636-195-1" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2009-05-04 .^ a b "UCAC4 629-058739" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 23 March 2025 .^ a b c d e Michel, Kai-Uwe; Mugrauer, Markus (January 2024). "Gaia search for (sub)stellar companions of exoplanet hosts (Supplementary file)" . Monthly Notices of the Royal Astronomical Society . 527 (2): 3183– 3195. Bibcode :2024MNRAS.527.3183M . doi :10.1093/mnras/stad3196 ^ a b "V838 Lyr" . General Catalog of Variable Stars - VizieR . Retrieved 3 April 2025 .^ a b c d e f g h i j 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 ^ a b c d e f g Pollacco, D.; et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet" . Monthly Notices of the Royal Astronomical Society . 385 (3): 1576– 1584. arXiv :0711.0126 Bibcode :2008MNRAS.385.1576P . doi :10.1111/j.1365-2966.2008.12939.x S2CID 2317308 . ^ a b c d Bonomo, A. S.; Desidera, S.; et al. (June 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 & Astrophysics 602 : A107. arXiv :1704.00373 Bibcode :2017A&A...602A.107B . doi :10.1051/0004-6361/201629882 . ^ a b Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release" . Monthly Notices of the Royal Astronomical Society . 490 (4): 5088– 5102. Bibcode :2019MNRAS.490.5088M . doi :10.1093/mnras/stz2673 ^ a b M Montalto; Gregorio, J.; Boue, G.; Mortier, A.; Boisse, I.; Oshagh, M.; Maturi, M.; Figueira, P.; Sousa, S.; Santos, N. C. (Nov 2, 2012). "A new analysis of the WASP-3 system: no evidence for an additional companion" . MNRAS . 427 (4): 2757. arXiv :1211.0218 Bibcode :2012MNRAS.427.2757M . doi :10.1111/j.1365-2966.2012.21926.x S2CID 59381004 . ^ Planet found tugging on transits Archived 2010-07-13 at the Wayback Machine , Astronomy Now, 9 July 2010^ G.Maciejewski; D.Dimitrov; R.Neuhaeuser; A.Niedzielski; St.Raetz; Ch.Ginski; Ch.Adam, C.Marka; M.Moualla; M.Mugrauer (2010). "Transit timing variation in exoplanet WASP-3b" . Monthly Notices of the Royal Astronomical Society . 407 (4): 2625– 2631. arXiv :1006.1348 Bibcode :2010MNRAS.407.2625M . doi :10.1111/j.1365-2966.2010.17099.x S2CID 120998224 .
External links
