Gliese 15 Ac
Longitude of periastron | −58.40+100.80 −53.30[1][2] | |
| Semi-amplitude | 2.5+1.3 −1.0[1] | |
|---|---|---|
| Star | Groombridge 34 A | |
| Physical characteristics | ||
| Mass | ≥36+25 −18 ME[1] | |
Gliese 15 Ac (also known as Groombridge 34 Ac, GX Andromedae c) is an
HIRES spectrographs,[4] and its existence was confirmed in April 2018 using HARPS-N data.[1] It has a minimum mass 36 times that of Earth and orbits at around 5.4 astronomical units with a period of 7,600 days (21 years), an orbit which may have been sculpted by interaction with the companion star, Gliese 15 B.[1][5] As of 2020, Gliese 15 Ac is the longest-period sub-Jovian planet discovered by radial velocity.[1][2]
References
- ^ .
- ^ a b "GJ 15 A c". NASA Exoplanet Archive. Retrieved 1 August 2020.
- .
- S2CID 119340839.
- ^ Brennan, Pat. "Discovery Alert: 2-planet System Is Close – and Weird". NASA. Retrieved 1 August 2020.
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