WASP-3

WASP-3
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]
Characteristics
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]
Astrometry
Proper motion (μ) RA: -5.20[1] mas/yr
Dec.: -23.10[1] mas/yr
Distance 727 ly
(223 pc)
Details
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
SIMBAD data
Extrasolar Planets
Encyclopaedia		 data

WASP-3 is a magnitude 10 yellow-white dwarf star located about 727 light-years away in the Lyra constellation.[1]

Contents

Planetary system

The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007.[2] The William Herschel Telescope had confirmed it was a planet by 2008.

In 2010, the possible presence of a second planet orbiting WASP-3 was inferred from timing variations in the transits of WASP-3b.[3] The discovers note that additional observations are required to confirm the presence of this planet candidate, designated WASP-3c. The best-fit parameters for WASP-3c which match the observe timing variations suggest it is close to the outer 2:1 resonance with WASP-3b, with an orbital period of 3.72–3.78 days and a mass 15 times that of the Earth (close to the mass of Uranus). Alternative sets of parameters are possible, though they give a poorer fit to the data: a 6–10 Earth mass planet in an orbit of 3.03–3.05 days (close to the 5:3 resonance), or a 10 Earth mass planet with a period of 3.58–3.64 days (close to the 2:1 resonance) also reproduce the observed timing variations.[4]

The WASP-3 system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity
b 2.06 ± 0.13 MJ 1.8468372 ± 6e-07 0.0313 ± 0.0001 0
c (unconfirmed) 0.05 MJ 0.051 3.75  ?

References

  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. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=WASP-3. Retrieved 2009-05-04. 
  2. ^ Pollacco et al.; 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. Bibcode 2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x. http://www3.interscience.wiley.com/journal/119396252/abstract. 
  3. ^ Planet found tugging on transits, Astronomy Now, 9 July 2010
  4. ^ 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:1006.1348v1 [astro-ph.EP]. 

External links

See also

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