HD 219134 d

HD 219134 d
Discovery
Discovery siteHARPS-N of the Telescopio Nazionale Galileo
Discovery date2015 July 30
radial velocity method (HARPS-N);
Orbital characteristics
Apastron0.2697 (± 0.0059) AU
Periastron0.2043 (± 0.0059) AU
0.2370 (± 0.003)[1] AU
Eccentricity0.138 (± 0.025)[1]
46.8590 (± 0.028)[1] d
Inclinationnull[1]
StarHD 219134
Physical characteristics
>1.61 (± 0.02)[1] R🜨
Mass>16.17 (± 0.64)[1] ME
Mean density
<21.4 g cm−3
<6.24 g
Temperature410.5 K (137.4 °C; 279.2 °F)

HD 219134 d, also known as HR 8832 d, is an exoplanet orbiting around the K-type star HD 219134 in the constellation of Cassiopeia. It has a minimum mass over 16 times that of Earth, indicating that it is likely a Hot Neptune. The exoplanet was initially detected by the instrument HARPS-N of the Italian Telescopio Nazionale Galileo via the radial velocity method. Unlike HD 219134 b and HD 219134 c it was not observed by the Spitzer Space Telescope and thus its radius and density are unknown. Only a minimum possible radius can be given.

  1. ^ a b c d e f "HD 219134 d CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-08.