Planetary System
In 2002 a discovery of a long-period, wide-orbiting planet (Gliese 777b) was announced by the Geneva extrasolar planet search team. The planet orbited in circular path and the orbital eccentricity was increased in later measurements (e=0.36). The planet was "Jupiter-twin" and was turned to "eccentric Jupiter" with mass about 1.5 times Jupiter and about the same size. In 2005 further observation of the star show another amplitude with a period of 17.1 days. This indicates one of the smallest discovered planets at the time. The mass was only 18 times more than Earth or about same as Neptune with very low eccentricity. There was a METI message sent to Gliese 777. It was transmitted from Eurasia's largest radar, 70-meter Eupatoria Planetary Radar. The message was named Cosmic Call 1, it was sent on July 1, 1999, and it will arrive at Gliese 777 in April 2051.
| Companion |
Mass | Semimajor axis |
Orbital period |
Eccentricity | Radius |
|---|---|---|---|---|---|
| c | ≥0.0600 ± 0.0076 MJ | 0.1304 ± 0.0075 | 17.1110 ± 0.0048 | 0.237 ± 0.082 | — |
| b | ≥1.56 ± 0.13 MJ | 4.01 ± 0.23 | 2915 ± 29 | 0.313 ± 0.019 | — |
Read more about this topic: Gliese 777
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