HD 108147 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 108147 | |
| Constellation | Crux | |
| Right ascension | (α) | 12h 25m 46.2686s |
| Declination | (δ) | –64° 01′ 19.516″ |
| Distance | 125.7 ly (38.57 pc) | |
| Spectral type | F8/G0V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.104 AU |
| Periastron | (q) | 0.052 AU |
| Apastron | (Q) | 0.156 AU |
| Eccentricity | (e) | 0.498 ± 0.025 |
| Orbital period | (P) | 10.901 ± 0.001 d (0.029845 y) |
| Orbital speed | (υ) | 104 km/s |
| Argument of periastron |
(ω) | 318 ± 3.03° |
| Time of periastron | (T0) | 2,451,591.6 ± 0.1 JD |
| Semi-amplitude | (K) | 25.1 ± 6.1 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.40 MJ (127 M⊕) |
| Discovery information | ||
| Discovery date | April 15, 2000[1] | |
| Discoverer(s) | Pepe, Mayor, Galland et al. | |
| Discovery method | Doppler spectroscopy (CORALIE) | |
| Discovery site | La Silla Observatory, Chile | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 108147 b is a gas giant exoplanet with a minimum mass about half that of Jupiter. It orbits the star in a very tight "torch orbit". The distance between the planet and the star is only a tenth of the distance between Earth and the Sun (0.1AU). A number of such worlds are known to exist, but the eccentricity of this planet is unusually high. Planets orbiting very close to their parent stars usually have round orbits because of the tidal forces between the bodies.
See also
References
- ↑ "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
- Pepe; Mayor, M.; Galland, F.; Naef, D.; Queloz, D.; Santos, N. C.; Udry, S.; Burnet, M. et al. (2002). "The CORALIE survey for southern extra-solar planets VII Two short-period Saturnian companions to HD 108147 and HD 168746". Astronomy and Astrophysics 388 (2): 632–638. arXiv:astro-ph/0202457. Bibcode:2002A&A...388..632P. doi:10.1051/0004-6361:20020433.
External links
- "HD 108147". Exoplanets.
Coordinates: 
12h 25m 46.2686s, −64° 01′ 19.516″