WASP-19
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 53m 40.07656s |
| Declination | −45° 39′ 33.0572″ |
| Apparent magnitude (V) | 12.312 ± 0.017 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G8V |
| Apparent magnitude (B) | 13.05 |
| Apparent magnitude (R) | 12.12 |
| Apparent magnitude (I) | 11.35 |
| Apparent magnitude (J) | 10.911 ± 0.026 |
| Apparent magnitude (H) | 10.602 ± 0.022 |
| Apparent magnitude (K) | 10.481 ± 0.023 |
| B−V color index | 1.3 |
| V−R color index | 0.1 |
| R−I color index | 0.82 |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | 21.41±0.95 km/s |
| Proper motion (μ) | RA: −35.457 mas/yr Dec.: 17.378 mas/yr |
| Parallax (π) | 3.7516±0.0090 mas |
| Distance | 869 ± 2 ly (266.6 ± 0.6 pc) |
| Absolute magnitude (MV) | 5.3 |
| Details | |
| Mass | 0.965+0.091 −0.095 M☉ |
| Radius | 1.006+0.031 −0.034 R☉ |
| Luminosity | 0.905+0.071 −0.069 L☉ |
| Surface gravity (log g) | 4.417+0.020 −0.021 cgs |
| Temperature | 5616+66 −65 K |
| Metallicity [Fe/H] | 0.04+0.25 −0.30 dex |
| Rotation | 11.76±0.09 d |
| Rotational velocity (v sin i) | 4.0 ± 1.0 km/s |
| Age | 6.4+4.1 −3.5 Gyr |
| Other designations | |
| Wattle, TOI-655, TIC 35516889, WASP-19, GSC 08181-01711, 2MASS J09534008-4539330, USNO-B1.0 0443-00193111 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-19, formally named Wattle, is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the Southern Hemisphere. This star has been found to host a transiting hot Jupiter-type planet in a tight orbit.
WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit.