WASP-48
WASP-48 is a subgiant star about 1400 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.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 24m 38.9616s |
| Declination | +55° 28′ 23.3317″ |
| Apparent magnitude (V) | 11.65±0.14 |
| Characteristics | |
| Spectral type | G0IV |
| Astrometry | |
| Radial velocity (Rv) | -19.740 km/s |
| Proper motion (μ) | RA: 6.141 mas/yr Dec.: -27.969 mas/yr |
| Parallax (π) | 2.1732 ± 0.0213 mas |
| Distance | 1,500 ± 10 ly (460 ± 5 pc) |
| Details | |
| Mass | 1.19±0.04 M☉ |
| Radius | 1.75±0.07 R☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 5920±150 K |
| Metallicity | −0.12±0.12 |
| Rotational velocity (v sin i) | 12.2±0.7 km/s |
| Age | 6+5 −4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star is rotating rapidly, being spun up by the tides raised by the giant planet on close orbit.
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