| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | Gliese 317 | |
| Constellation | Pyxis | |
| Right ascension | (α) | 08h 40m 59.21s |
| Declination | (δ) | –23° 27′ 22.6″ |
| Apparent magnitude | (mV) | 12 |
| Distance | 49.9 ly (15.3 pc) |
|
| Spectral type | M3.5V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.95 AU |
| Eccentricity | (e) | 0.193 ± 0.06 |
| Orbital period | (P) | 692.9 ± 4 d (1.9 ± 1.1 y) |
| Argument of periastron |
(ω) | 344 ± 10° |
| Time of periastron | (T0) | 2451639 ± 30 JD |
| Semi-amplitude | (K) | 57.3 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.2 MJ |
| Discovery information | ||
| Discovery date | 6 July 2007 | |
| Discoverer(s) | Johnson et al. | |
| Detection method | Doppler spectroscopy | |
| Discovery site | W. M. Keck | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
Gliese 317 b is an extrasolar planet[1] approximately 50 light-years away in the constellation of Pyxis. The planet was announced in July 2007 to be orbiting the red dwarf star Gliese 317. The planet is a jovian planet that orbits about 95% the distance between Earth to the Sun. Despite of this, it takes about 1.9 years, corresponding to slow orbital velocity of 14.82 km/s.