WASP-48
G-type main-sequence star
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WASP-48 is a G-type main-sequence star about 1,500 light-years away in the constellation Cygnus. The star is likely older than the Sun and slightly depleted in heavy elements. It shows an infrared excess noise of unknown origin,[9] yet has no detectable ultraviolet emissions associated with starspot activity.[10] The discrepancy may be due to large interstellar absorption of light in interstellar medium for WASP-48.[11] The measurements are compounded by the emission from eclipsing contact binary NSVS-3071474 projected on sky plane nearby,[12] although no true stellar companions were detected by survey in 2015.[13]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 24m 38.9614s[2] |
| Declination | +55° 28′ 23.332″[2] |
| Apparent magnitude (V) | 11.65±0.14[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G0V[4] |
| Astrometry | |
| Radial velocity (Rv) | −19.47±0.65[2] km/s |
| Proper motion (μ) | RA: +6.210[2] mas/yr Dec.: −28.007[2] mas/yr |
| Parallax (π) | 2.1639±0.0104 mas[2] |
| Distance | 1,507 ± 7 ly (462 ± 2 pc) |
| Details | |
| Mass | 1.09±0.08[5] M☉ |
| Radius | 1.09±0.14[5] R☉ |
| Luminosity | 3.8[6] L☉ |
| Surface gravity (log g) | 4.03±0.03[7] cgs |
| Temperature | 6,000±150[5] K |
| Metallicity | −0.12±0.12[7] |
| Rotation | 7.2±0.5 d[7] |
| Rotational velocity (v sin i) | 12.2±0.7[5] km/s |
| Age | 7.9+2.0 −1.6[7] Gyr |
| Other designations | |
| TOI-1628, TIC 284475976, WASP-48, TYC 3925-739-1, GSC 03925-00739, 2MASS J19243895+5528233[8] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
The star is rotating rapidly, being spun up by the tides raised by the giant planet on close orbit.[14]
Planetary system
In 2011 a transiting hot Jupiter planet, WASP-48b, was detected.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.98±0.09 MJ | 0.03444±0.00043 | 2.143634±0.000003 | 0 | 80.09+0.69 −0.55° |
1.67±0.08 RJ |