Gliese 777 b
Coordinates: 
20h 03m 37.41s, +29° 53′ 48.50″
20h 03m 37.41s, +29° 53′ 48.50″| Discovery | |
|---|---|
a (2,854 ± 13 d) | |
| 219.5±4.1 | |
| Inclination | 80.2±23.2 |
| 306.6±44.4 | |
| 2447871±38 | |
| 19.9±3.6 | |
| Semi-amplitude | 24.4±0.6 |
| Star | Gliese 777 A |
| Physical characteristics[1] | |
| Mass | 1.8±0.2 MJ |
Gliese 777 b, also known as Gliese 777 Ab or HD 190360 b, is an
The planet has one of the longest orbits currently known for an extrasolar planet. The planet's mean distance from the star is close to the distance between Jupiter and the Sun. However, unlike Jupiter it has an
eccentric orbit. At periastron the distance between the planet and the star is only 2.57 AU and at apastron the distance is as much as 5.23 AU (compared to the Solar System, distance from the Sun to the inner asteroid belt
and from Sun to just beyond the orbit of Jupiter).
The signal produced by the planet is very weak and the eccentricity was originally supposed to be very circular which led to speculations of a very Jupiter-like planet, with a system of several large moons like Jupiter itself. The inner system should be stable for Earth-like planets despite a known, smaller inner Neptune-like planet which is known to orbit the star at distance of 0.12 AU every 17 Earth days.
References
- ^ .
- S2CID 14853884.
External links
- "Gl 777 / HR 7670 / BD+29 3872 ABab". SolStation. Retrieved 2008-07-02.
