WASP-103
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 37m 15.5766s |
| Declination | 07° 11′ 00.110″ |
| Apparent magnitude (V) | 12.1 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | F8V |
| Astrometry | |
| Radial velocity (Rv) | −40.69±1.00 km/s |
| Proper motion (μ) | RA: −9.756 mas/yr Dec.: 2.779 mas/yr |
| Parallax (π) | 1.8332±0.1073 mas |
| Distance | 1,800 ± 100 ly (550 ± 30 pc) |
| Details | |
| Mass | 1.220+0.039 −0.036 M☉ |
| Radius | 1.436+0.052 −0.031 R☉ |
| Luminosity | 3.3 L☉ |
| Surface gravity (log g) | 4.35±0.02 cgs |
| Temperature | 6110±160 K |
| Metallicity [Fe/H] | 0.06±0.13 dex |
| Rotational velocity (v sin i) | 10.60±0.90 km/s |
| Age | 4±1 Gyr |
| Other designations | |
| Gaia DR2 4439085988769170432, 2MASS J16371556+0711000 | |
| Database references | |
| SIMBAD | data |
WASP-103 is an F-type main-sequence star located 1,800 ± 100 light-years (550 ± 30 parsecs) away in the constellation Hercules. Its surface temperature is 6,110±160 kelvins (K). The star's concentration of heavy elements is similar to that of the Sun. WASP-103 is slightly younger than the Sun at 4±1 billion years. The chromospheric activity of the star is elevated due to interaction with the giant planet on a close-in orbit.
A multiplicity survey in 2015 found a suspected stellar companion to WASP-103, at a projected separation of 0.242″±0.016″.