Astronomy:Gliese 777 Ac
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| Discovery | |
|---|---|
| Discovered by | Marcy et al. |
| Discovery site | United States |
| Discovery date | 24 June 2005 |
| Doppler spectroscopy | |
| Orbital characteristics[1] | |
| 0.1296+0.0017 −0.0018 astronomical unit|AU | |
| Eccentricity | 0.165+0.023 −0.024 |
| Orbital period | 0.0468647(14) years (17.12 days) |
| astron|astron|helion}} | 2,455,210.27±0.42 |
| 323.4°+9.2° −9.1° | |
| Star | Gliese 777 A |
| Physical characteristics | |
| Mass | 25.4+15.6 −3.5 M🜨[1] |
Gliese 777 Ac, also known as HD 190360 c, is an extrasolar planet approximately 52 light-years away in the constellation of Cygnus. The planet was discovered orbiting the primary star of the Gliese 777 system in 2005 using the radial velocity method and confirmed in 2009.[2][3] The planet was once called the "smallest extrasolar planet discovered", but this is currently no longer the case. With a mass just 25 times that of the Earth, the planet is likely a "hot Neptune" planet, a small Jovian planet, or possibly a large terrestrial planet (a super-Earth).
See also
References
- ↑ 1.0 1.1 Giovinazzi, Mark R.; Blake, Cullen H.; Robertson, Paul; Lin, Andrea S. J.; Gupta, Arvind F.; Mahadevan, Suvrath; Fernandes, Rachel B.; Wright, Jason T. et al. (2025). "The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems". The Astronomical Journal 170: 52. doi:10.3847/1538-3881/add922. Bibcode: 2025AJ....170...52G.
- ↑ Vogt, Steven S. et al. (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal 632 (1): 638–658. doi:10.1086/432901. Bibcode: 2005ApJ...632..638V. https://authors.library.caltech.edu/36250/1/0004-637X_632_1_638.pdf. Retrieved 2020-09-03.
- ↑ Wright, J. T. et al. (2009). "Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems". The Astrophysical Journal 693 (2): 1084–1099. doi:10.1088/0004-637X/693/2/1084. Bibcode: 2009ApJ...693.1084W.
External links
- "Gl 777 / HR 7670 / BD+29 3872 ABab". SolStation. http://www.solstation.com/stars2/gl777ab.htm. Retrieved 2008-07-02.
Coordinates: 
20h 03m 37.41s, +29° 53′ 48.50″
de:Gliese 777#Gliese 777 Ac
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