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Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 18h 34m 31.6249s[1]
Declination +35° 39′ 41.546″[1]
Apparent magnitude (V) +10.485[1]
Spectral type F7V[1]
Apparent magnitude (B) ~11.01[1]
Apparent magnitude (V) ~10.485[1]
Apparent magnitude (J) 9.603±0.020[1]
Apparent magnitude (H) 9.407±0.014[1]
Apparent magnitude (K) 9.361±0.015[1]
Variable type V*(1SWASP)[1]
Proper motion (μ) RA: -5.20[1] mas/yr
Dec.: -23.10[1] mas/yr
Distance 727 ly
(223 pc)
Mass 1.24 −0.11+0.06 M
Radius 1.31 −0.12+0.06 R
Temperature 6400 ±100 K
Metallicity 0 (±0.2
Other designations
TYC 2636-195-1, 2MASS J18343163+3539415, USNO-B1.0 1256-00285133
Database references
Extrasolar Planets

WASP-3 is a magnitude 10 yellow-white dwarf star located about 727 light-years away in the Lyra constellation.[1] It appears to be variable; it "passed from a less active (log R'_hk=-4.95) to a more active (log R'_hk=-4.8) state between 2007 and 2010".[2]

Planetary system[edit]

The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007.[3] The William Herschel Telescope had confirmed it was a planet by 2008.

In 2010, researchers proposed a second planet orbiting WASP-3.[4][5] But in 2012 this proposal was debunked.[2]

The WASP-3 planetary system
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b 2.06 ± 0.13 MJ 0.0313 ± 0.0001 1.8468372 ± 6e-07 0

See also[edit]


  1. ^ a b c d e f g h i j k l m "SIMBAD query result: TYC 2636-195-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-04. 
  2. ^ 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:1211.0218Freely accessible. Bibcode:2012MNRAS.427.2757M. doi:10.1111/j.1365-2966.2012.21926.x. 
  3. ^ Pollacco; Skillen, I.; Collier Cameron, A.; Loeillet, B.; Stempels, H. C.; Bouchy, F.; Gibson, N. P.; Hebb, L.; et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet". Monthly Notices of the Royal Astronomical Society. 385 (3): 1576–1584. arXiv:0711.0126Freely accessible. Bibcode:2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x. 
  4. ^ Planet found tugging on transits, Astronomy Now, 9 July 2010
  5. ^ 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". arXiv:1006.1348v1Freely accessible [astro-ph.EP]. 

External links[edit]

  • "WASP-3". Exoplanets. Retrieved 2009-05-04. 

Coordinates: Sky map 18h 34m 31.6249s, +35° 39′ 41.546″