WASP-3
Star in the constellation Lyra From Wikipedia, the free encyclopedia
WASP-3 is a magnitude 10 yellow-white dwarf star located about 800 light-years away in the Lyra constellation.[3] 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".[4]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 34m 31.6241s[1] |
| Declination | +35° 39′ 41.488″[1] |
| Apparent magnitude (V) | 10.63[2] |
| Characteristics | |
| Spectral type | F7V[3] |
| Apparent magnitude (B) | 11.07[2] |
| Apparent magnitude (J) | 9.603±0.020[3] |
| Apparent magnitude (H) | 9.407±0.014[3] |
| Apparent magnitude (K) | 9.361±0.015[3] |
| Variable type | EP[3] |
| Astrometry | |
| Proper motion (μ) | RA: −4.896±1.058[1] mas/yr Dec.: −21.664±0.686[1] mas/yr |
| Parallax (π) | 4.07 ± 0.32 mas[1] |
| Distance | 800 ± 60 ly (250 ± 20 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 | |
| Database references | |
| SIMBAD | data |
The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007.[5] The William Herschel Telescope had confirmed it was a planet by 2008.
In 2010, researchers proposed a second planet orbiting WASP-3.[6][7] But in 2012 this proposal was debunked.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.06 ± 0.13 MJ | 0.0313 ± 0.0001 | 1.8468372 ± 6e-07 | 0 | — | — |
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