| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12h13m 27.8904s[1] |
| Declination | +23° 03′ 20.459″[1] |
| Apparent magnitude (V) | 11.48[2] |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | G6[3] |
| Astrometry | |
| Radial velocity (Rv) | 4.636 km/s |
| Proper motion (μ) | RA: −36.262±0.810[1] mas/yr Dec.: 0.871±0.590[1] mas/yr |
| Parallax (π) | 3.0865 ± 0.0511 mas[1] |
| Distance | 1,060 ± 20 ly (324 ± 5 pc) |
| Details[4] | |
| Mass | 1.107±0.024[5] M☉ |
| Radius | 1.112+0.026 −0.022[5] R☉ |
| Surface gravity (log g) | 4.45 ± 0.1 cgs |
| Temperature | 5600 ± 100 K |
| Metallicity [Fe/H] | 0.12±0.06[5] dex |
| Rotational velocity (v sin i) | 1.5 ± 0.9 km/s |
| Age | 6.2+3.0 −2.1[5] Gyr |
| Other designations | |
Melotte 111 AV 561, Gaia DR2 4001613814138156416, TYC 1986-1561-1, 2MASS J12132790+2303205 | |
| Database references | |
| SIMBAD | data |
WASP-56 is a sun-like starofspectral type G6 in the constellation of Coma Berenices.[6] It has an apparent magnitude of 11.48. Observations at the Calar Alto Observatory using the lucky imaging technique detected a candidate companion star located 3.4 arc seconds away, however it is not known if this is an actual binary companion or an optical double.[7]
It has a planet that was discovered by transit photometry in 2011 by the SuperWASP program. Fourteen transits were observed over three watching seasons, each lasting 214 minutes and reducing the stars' brightness by 14 millimagnitudes.[4] The planet has around 0.6 times the mass of Jupiter and an orbital period of 4.6 days. The planet possibly has a large core of heavy metals.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.599+0.040 −0.039 MJ |
0.05614+0.00040 −0.00041 |
4.6171010±0.000003 | <0.082 | 88.5+0.1 −0.2° |
1.092+0.035 −0.033 RJ |
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