HD 117618 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 117618 | |
| Constellation | Centaurus | |
| Right ascension | (α) | 13h 32m 25.56s |
| Declination | (δ) | –47° 16′ 16.91″ |
| Distance | 124.0 ly (38.02 pc) | |
| Spectral type | G2V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.176 ± 0.010 AU |
| Periastron | (q) | 0.102 AU |
| Apastron | (Q) | 0.250 AU |
| Eccentricity | (e) | 0.42 ± 0.17 |
| Orbital period | (P) | 25.827 ± 0.019 d (0.070709 y) |
| Orbital speed | (υ) | 74.4 km/s |
| Argument of periastron |
(ω) | 254 ± 19° |
| Time of periastron | (T0) | 2,450,832.2 ± 1.8 JD |
| Semi-amplitude | (K) | 12.8 ± 2.2 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.178 ± 0.021 MJ (>56.5 M⊕) |
| Discovery information | ||
| Discovery date | 16 September 2004 | |
| Discoverer(s) | C.G. Tinney, Butler, Marcy et al.[1] | |
| Discovery method | Radial velocity | |
| Discovery site | Anglo-Australian Observatory | |
| Discovery status | Published[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 117618 b is an exoplanet discovered orbiting the star in September 2004. The planet is a small gas giant less than a fifth the mass of Jupiter. It orbits close to its star in a very eccentric orbit.[1][2]
References
- ↑ 1.0 1.1 1.2 Tinney, C. G. et al. (2005). "Three Low-Mass Planets from the Anglo-Australian Planet Search". The Astrophysical Journal 623 (2): 1171–1179. Bibcode:2005ApJ...623.1171T. doi:10.1086/428661.
- ↑ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
- "HD 117618". Exoplanets.
- California & Carnegie Planet Search entry
Coordinates: 
13h 32m 25.56s, −47° 16′ 16.91″