HD 219134 g

HD 219134 g
Discovery
Discovered by	HARPS-N
Discovery site	La Palma, Canary Islands
Discovery date	2015 November 17
Detection method	radial velocity method
Orbital characteristics
Semi-major axis	0.3753±0.0004 AU, 0.603±0.001 AU
Eccentricity	0, 0.16±0.1
Orbital period (sidereal)	94.2±0.2 d, 192.0+0.5; −0.4 d
Argument of periastron	0°, −0.4±0.6 rad
Semi-amplitude	1.8±0.2 m/s, 2.0±0.2 m/s
Star	HD 219134
Physical characteristics
Mass	≥10.8±1.3 M🜨, ≥15.3±1.6 M🜨
Temperature	298 K (25 °C; 77 °F)

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.

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

[Vogt2015-1] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference Vogt2015 was invoked but never defined (see the help page).

[Hirsch2020-2] ^ ^a ^b ^c ^d ^e ^f ^g Cite error: The named reference Hirsch2020 was invoked but never defined (see the help page).

[ExoplanetsCalculator-3] "HEC: Exoplanets Calculator". phl.upr.edu. Archived from the original on 2017-08-24. Retrieved 2017-12-24.

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