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Extrasolar planet List of extrasolar planets
Exoplanet Comparison WASP-3 b.png
Size comparison of WASP-3b with Jupiter.
Parent star
Star WASP-3
Constellation Lyra
Right ascension (α) 18h 33m 32s
Declination (δ) +35° 39′ 42″
Apparent magnitude (mV) 10.64
Distance 727 ly
(223 pc)
Spectral type F7V
Orbital elements
Semimajor axis (a) 0.0317+0.0006
Eccentricity (e) 0
Orbital period (P) 1.8468372 ± 6e-07 d
Inclination (i) 85.06+0.15
Time of transit (Tt) 2454605.55915 ± 0.00023 JD
Physical characteristics
Mass (m) 2.06 ± 0.13 MJ
Radius (r) 1.454 ± 0.084 RJ
Density (ρ) 1040 kg m-3
Surface gravity (g) 2.71 m/s² (26.6 g)
Temperature (T) 1983 K
Discovery information
Discovery date October 31, 2007
Discoverer(s) Pollacco et al. (SuperWASP)
Discovery method Transit
Discovery site ORM
Discovery status Published
Database references
Extrasolar Planets
The radial velocity of WASP-3 over time, caused by the presence of WASP-3 b.

WASP-3b is an extrasolar planet orbiting the star WASP-3 located over 727 light-years away in the constellation Lyra. It was discovered via the transit method by SuperWASP, and follow up radial velocity observations confirmed that WASP-3b is a planet. The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. WASP-3b has such an orbital distance around its star to classify it in the class of planets known as hot Jupiters and has an atmospheric temperature of approximately 1983 K.[1]

WASP-3b undergoes no detectable gravitational tugging from other bodies in this system.[2]

See also[edit]


  1. ^ Pollacco 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. 
  2. ^ M Montalto et al. (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. 

External links[edit]

Media related to WASP-3b at Wikimedia Commons

Coordinates: Sky map 18h 33m 32s, +35° 39′ 42″