| Discovery | |
|---|---|
| Discovered by | HARPS-N |
| Discovery site | La Palma, Canary Islands |
| Discovery date | 2015 November 17 |
| radial velocity method | |
| Orbital characteristics | |
| 0.3753±0.0004 AU,[1] 0.603±0.001 AU[2] | |
| Eccentricity | 0,[1] 0.16±0.1[2] |
| 94.2±0.2 d,[1] 192.0+0.5 −0.4 d[2] | |
| 0°,[1] −0.4±0.6 rad[2] | |
| Semi-amplitude | 1.8±0.2 m/s,[1] 2.0±0.2 m/s[2] |
| Star | HD 219134 |
| Physical characteristics | |
| Mass | ≥10.8±1.3 M🜨,[1] ≥15.3±1.6 M🜨[2] |
| Temperature | 298 K (25 °C; 77 °F)[3] |
HD 219134 g, also known as HR 8832 g, is an unconfirmed[2] exoplanet orbiting around the K-type star HD 219134 in the constellation of Cassiopeia. It has a minimum mass of 11 or 15 Earth masses, suggesting that it is likely a Neptune-like ice giant. Unlike HD 219134 b and HD 219134 c it is not observed to transit and thus its radius and density are unknown. If it has an Earth-like composition, it would have a radius 1.9 times that of Earth.[citation needed] However, since it is probably a Neptune-like planet, it is likely larger.
Vogt2015 was invoked but never defined (see the help page).Hirsch2020 was invoked but never defined (see the help page).