20h03m37.41s, +29° 53′ 48.50″| Discovery | |
|---|---|
| Discovered by | Marcy et al. |
| Discovery site | United States |
| Discovery date | 24 June 2005 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 0.129 AU (19,300,000 km) |
| Periastron | 0.127 AU (19,000,000 km) |
| 0.128 ± 0.002 AU (19,150,000 ± 300,000 km) | |
| Eccentricity | 0.01 ± 0.1 |
| 17.1 ± 0.015 d 0.047 y | |
| 2,450,000.07 ± 0.9 | |
| 153.7 ± 32 | |
| Semi-amplitude | 4.6 ± 1.1 |
| Star | Gliese 777 A |
| Physical characteristics | |
| Temperature | ~717 |
Gliese 777 c, often catalogued as Gliese 777 Ac or simply HD 190360 c, is an extrasolar planet approximately 52 light-years away in the constellationofCygnus. The planet was discovered orbiting the primary star of the Gliese 777 system in 2005 using the radial velocity method and confirmed in 2009.[1][2] The planet was once called the "smallest extrasolar planet discovered", but this is currently no longer the case. With a minimum mass just 18 times that of the Earth, the planet is likely a "hot Neptune" planet, a small Jovian planet, or possibly a large terrestrial planet (asuper-Earth).
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