WASP-48
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 24m 38.9614s |
| Declination | +55° 28′ 23.332″ |
| Apparent magnitude (V) | 11.65±0.14 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G0V |
| Astrometry | |
| Radial velocity (Rv) | −19.47±0.65 km/s |
| Proper motion (μ) | RA: +6.210 mas/yr Dec.: −28.007 mas/yr |
| Parallax (π) | 2.1639±0.0104 mas |
| Distance | 1,507 ± 7 ly (462 ± 2 pc) |
| Details | |
| Mass | 1.09±0.08 M☉ |
| Radius | 1.09±0.14 R☉ |
| Luminosity | 3.8 L☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 6,000±150 K |
| Metallicity | −0.12±0.12 |
| Rotation | 7.2±0.5 d |
| Rotational velocity (v sin i) | 12.2±0.7 km/s |
| Age | 7.9+2.0 −1.6 Gyr |
| Other designations | |
| Gaia DR2 2141754578242371584, TYC 3925-739-1, GSC 03925-00739, 2MASS J19243895+5528233 | |
| Database references | |
| SIMBAD | data |
WASP-48 is a G-type main-sequence star about 1,500 light-years away. The star is likely older than Sun and slightly depleted in heavy elements. It shows an infrared excess noise of unknown origin, yet has no detectable ultraviolet emissions associated with the starspot activity. The discrepancy may be due to large interstellar absorption of light in interstellar medium for WASP-48. The measurements are compounded by the emission from eclipsing contact binary NSVS-3071474 projected on sky plane nearby, although no true stellar companions were detected by survey in 2015.
The star is rotating rapidly, being spun up by the tides raised by the giant planet on close orbit.