HD 219134 h, also known as HR 8832 h, is an
exoplanet orbiting around the
K-type star
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the ...
HD 219134
HD 219134 (also known as Gliese 892 or HR 8832) is a main-sequence star in the constellation of Cassiopeia. It is smaller and less luminous than the Sun, with a spectral class of K3V, which makes it an orange-hued star. HD 219134 is rel ...
in the constellation of
Cassiopeia. It has a
minimum mass
In astronomy, minimum mass is the lower-bound calculated mass of observed objects such as planets, stars and binary systems, nebulae, and black holes.
Minimum mass is a widely cited statistic for extrasolar planets detected by the radial veloci ...
of 108 Earth masses, which indicates that the planet is likely a
gas giant
A gas giant is a giant planet composed mainly of hydrogen and helium. Gas giants are also called failed stars because they contain the same basic elements as a star. Jupiter and Saturn are the gas giants of the Solar System. The term "gas giant" ...
. Unlike
HD 219134 b and
c it is not observed to transit and thus its radius and density are unknown.
This planet was initially reported in two 2015 papers; one referred to it as HD 219134 e,
while the other found different, and more accurate, parameters for it and so treated it as a different planet, designated HD 219134 h.
It is now generally referred to by the HD 219134 h designation.
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References
{{Extrasolar-planet-stub
Cassiopeia (constellation)
Exoplanets discovered in 2015
Exoplanets detected by radial velocity
Giant planets