WASP-47
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 04m 48.7262s |
| Declination | −12° 01′ 07.999″ |
| Apparent magnitude (V) | 11.9 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | G9V |
| Astrometry | |
| Radial velocity (Rv) | −26.56(47) km/s |
| Proper motion (μ) | RA: 15.074(20) mas/yr Dec.: −41.467(20) mas/yr |
| Parallax (π) | 3.7010±0.0201 mas |
| Distance | 881 ± 5 ly (270 ± 1 pc) |
| Details | |
| Mass | 1.11±0.05 M☉ |
| Radius | 1.16±0.26 R☉ |
| Luminosity | 1.11 L☉ |
| Surface gravity (log g) | 4.34 cgs |
| Temperature | 5,576±67 K |
| Metallicity [Fe/H] | +0.36±0.05 dex |
| Rotation | 32.5±3.9 d |
| Age | 6.3+1.8 −1.6 Gyr |
| Other designations | |
| Gaia DR3 2613413008919918976, K2-23, EPIC 206103150, TOI-4539, 2MASS J22044873-1201079, WISE J220448.74-120108.4 | |
| Database references | |
| SIMBAD | data |
WASP-47 is a star similar in size and brightness to the Sun about 881 light-years away in the constellation Aquarius. It lies within the Kepler K2 campaign field 3. It was first noticed to have a hot Jupiter exoplanet orbiting every 4 days in 2012 by the Wide Angle Search for Planets (WASP) team. While it was thought to be a typical hot Jupiter system, three more planets were found in 2015: an outer gas giant within the habitable zone, a hot Neptune exterior to the hot Jupiter's orbit and a super-Earth interior to the hot Jupiter's orbit. WASP-47 is the only planetary system known to have both planets near the hot Jupiter and another planet much further out.