WASP-19
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 tight orbit.
| 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 | |
| Spectral type | G8V |
| Apparent magnitude (B) | 13.58 |
| Apparent magnitude (R) | 12.17 |
| 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 | 0.97±0.02 M☉ |
| Radius | 0.885+0.086 −0.084 R☉ |
| Luminosity | 0.71 L☉ |
| Surface gravity (log g) | 4.45 ± 0.05 cgs |
| Temperature | 5568 ± 71 K |
| Metallicity [Fe/H] | 0.15 ± 0.07 dex |
| Rotation | 11.76±0.09 d |
| Rotational velocity (v sin i) | 4.0 ± 1.0 km/s |
| Age | 9.95±2.49 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
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