WASP-4
 Artistic rendering of WASP-4 b | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23h 34m 15.06s[1] |
| Declination | −42° 03′ 41.1″[1] |
| Apparent magnitude (V) | 12.5[2] |
| Characteristics | |
| Spectral type | G7V[1] |
| Apparent magnitude (V) | 13.0[1] |
| Apparent magnitude (R) | 11.9[1] |
| Variable type | V*(1SWASP)[1] |
| Astrometry | |
| Distance | 1000 ± 160 ly (300 ± 50[2] pc) |
| Details | |
| Mass | 0.85 +0.11-0.07[3] M☉ |
| Radius | 0.87 +0.04-0.03[3] R☉ |
| Surface gravity (log g) | 4.45+0.016 −0.029[2] cgs |
| Temperature | 5500 ± 150[2] K |
| Metallicity | [M/H]=0.0 ± 0.2[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
WASP-4 is a G-type main sequence star approximately 1,000 light-years away in the constellation of Phoenix.[1]
Planetary system
In 2007, an extrasolar planet, WASP-4b, was discovered orbiting this star.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| WASP-4b | 1.237 ± 0.064[4] MJ | 0.0230±0.001 | 1.3382282±0.000003 | 0 | — | — |
See also
References
- 1 2 3 4 5 6 7 8 WASP-4, entry, SIMBAD. Accessed on line June 19, 2008.
- 1 2 3 4 5 6 Wilson; et al. (March 2008). "WASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere". The Astrophysical Journal Letters. 675 (2): L113–L116. arXiv:0801.1509
. Bibcode:2008ApJ...675L.113W. doi:10.1086/586735. - 1 2 Gillon; et al. (2009). "Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b". Astronomy and Astrophysics. 496: 259–267. arXiv:0812.1998. Bibcode:2009A&A...496..259G. doi:10.1051/0004-6361:200810929.
- ↑ Winn; et al. (April 2009). "THE TRANSIT LIGHT CURVE PROJECT. XI. SUBMILLIMAGNITUDE PHOTOMETRY OF TWO TRANSITS OF THE BLOATED PLANET WASP-4b". The Astronomical Journal. 137 (4): 3826–3833. arXiv:0901.4346. Bibcode:2009AJ....137.3826W. doi:10.1088/0004-6256/137/4/3826.
External links
- "SuperWASP Homepage". Retrieved 2008-07-02.
- "UK planet hunters announce three new finds" (PDF). 2007-10-30. Retrieved 2008-07-02.
Coordinates: 
23h 34m 15.06s, −42° 03′ 41.1″
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