| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | WASP-19 | |
| Constellation | Vela | |
| Right ascension | (α) | 09h 53m 40.07s |
| Declination | (δ) | -45° 39′ 33.06″ |
| Apparent magnitude | (mV) | 12.3 |
| Distance | 815 ly (250[1] pc) |
|
| Spectral type | G8V[2] | |
| Mass | (m) | 0.95[2] M☉ |
| Orbital elements | ||
| Semimajor axis | (a) | 0.01655 (± 0.00013)[2] AU (2.45 Gm) |
| Periastron | (q) | 0.0161 AU (2.41 Gm) |
| Apastron | (Q) | 0.0167 AU (2.49 Gm) |
| Eccentricity | (e) | 0.0046 +0.0044 −0.0028[2] |
| Orbital period | (P) | 0.78884 (± 3e-07)[1] d |
| (18.93216 h) | ||
| Orbital speed | (υ) | 227 km/s |
| Inclination | (i) | 79.4 ± 0.4[2]° |
| Time of transit | (Tt) | 2455168.96801 (± 9e-05)[2] JD |
| Physical characteristics | ||
| Mass | (m) | 1.168 ± 0.023[2] MJ |
| Radius | (r) | 1.386 ± 0.032[2] RJ |
| Density | (ρ) | 680[1] kg m-3 |
| Temperature | (T) | 2009[1] K |
| Discovery information | ||
| Discovery date | December 10, 2009[1] | |
| Discoverer(s) | Hebb et al. (SuperWASP)[1] | |
| Detection method | Transit[1] | |
| Discovery status | Published[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
WASP-19b is an extrasolar planet, notable for possessing the shortest orbital period of any known planetary body: 0.7888399 days or approximately 18.932 hours. It has a mass close to that of Jupiter (1.15 Jupiter masses), but by comparison has a much larger radius (1.31 times that of Jupiter, or 0.13 Solar radii); making it nearly the size of a low-mass star[1]. It orbits the star WASP-19a in the Vela constellation.
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