HD 117618 b
Exoplanet | List of exoplanets | |
---|---|---|
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 | ||
Semi-major 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 2 3 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″
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