HD 219134 g

HD 219134 g
Discovery
Discovered byHARPS-N
Discovery siteLa Palma, Canary Islands
Discovery date2015 November 17
radial velocity method
Orbital characteristics
0.3753±0.0004 AU,[1] 0.603±0.001 AU[2]
Eccentricity0,[1] 0.16±0.1[2]
94.2±0.2 d,[1] 192.0+0.5
−0.4
 d
[2]
,[1] −0.4±0.6 rad[2]
Semi-amplitude1.8±0.2 m/s,[1] 2.0±0.2 m/s[2]
StarHD 219134
Physical characteristics
Mass≥10.8±1.3 M🜨,[1] ≥15.3±1.6 M🜨[2]
Temperature298 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.

  1. ^ a b c d e f Cite error: The named reference Vogt2015 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Hirsch2020 was invoked but never defined (see the help page).
  3. ^ "HEC: Exoplanets Calculator". phl.upr.edu. Archived from the original on 2017-08-24. Retrieved 2017-12-24.