Gliese 777 Ac
From Wikipedia, the free encyclopedia
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.128 ± 0.002 AU |
| Eccentricity | (e) | 0.01 ± 0.1 |
| Orbital period | (P) | 17.1 ± 0.015 d |
| Inclination | (i) | ?° |
| Angular distance | (θ) | 8.055 mas |
| Longitude of periastron |
(ω) | 153.7 ± 32° |
| Time of periastron | (T0) | 2,450,000.07 ± 0.9 JD |
| Semi-amplitude | (K) | 4.6 ± 1.1 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.057 MJ (>18 M⊕) |
| Discovery information | ||
| Discovery date | June 24, 2005 | |
| Discoverer(s) | Marcy et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery site | Hawaii, USA | |
| Discovery status | Published | |
Gliese 777 Ac is one of the smallest extrasolar planets discovered to date with a minimum mass just 18 times that of the Earth. It is likely a "hot Neptune", a small gas giant, or possibly a rocky "super-Earth". It orbits the star Gliese 777 A.
[edit] References
- Vogt et al. (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal 632 (1): 638 – 658. doi:.
