HD 219134 h, also known as HR 8832 h, is an exoplanet orbiting around the K-type star HD 219134 in the constellation of Cassiopeia. It has a minimum mass of 108 Earth masses, which indicates that the planet is likely a gas giant. Unlike HD 219134 b and c it is not observed to transit and thus its radius and density are unknown.

HD 219134 h
Discovery
Discovery date2015 November 17
radial velocity method
Designations
HD 219134 e, HR 8832 h
Orbital characteristics[2][3]
2.968±0.037 AU
Eccentricity0.025+0.027
−0.018
2100.6±2.9 d[1]
2456761±20 JD
0.0°±63.0°
Semi-amplitude5.73+0.22
−0.23
 m/s
StarHD 219134
Physical characteristics[2][3]
Mass≥97.9±4.4 M🜨

This planet was initially reported in two 2015 papers; one referred to it as HD 219134 e,[4] while the other found different, and more accurate, parameters for it and so treated it as a different planet, designated HD 219134 h.[5] It is now generally referred to by the HD 219134 h designation.[6][3]

ReferencesEdit

  1. ^ TESS-Keck Survey XIV: 2 giant exoplanets from the Distant Giants Survey, 2022, arXiv:2209.06958
  2. ^ a b Rosenthal, Lee J.; et al. (2021). "The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades". The Astrophysical Journal Supplement Series. 255 (1): 8. arXiv:2105.11583. Bibcode:2021ApJS..255....8R. doi:10.3847/1538-4365/abe23c. S2CID 235186973.
  3. ^ a b c "HD 219134". NASA Exoplanet Archive. Retrieved 11 December 2022.
  4. ^ Motalebi, F.; et al. (December 2015). "The HARPS-N Rocky Planet Search. I. HD 219134 b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun". Astronomy & Astrophysics. 584: A72. arXiv:1507.08532. Bibcode:2015A&A...584A..72M. doi:10.1051/0004-6361/201526822. S2CID 45652878.
  5. ^ Vogt, Steven S.; et al. (November 2015). "Six Planets Orbiting HD 219134". The Astrophysical Journal. 814 (1): 12. arXiv:1509.07912. Bibcode:2015ApJ...814...12V. doi:10.1088/0004-637X/814/1/12. S2CID 45438051.
  6. ^ Johnson, Marshall C.; et al. (April 2016). "A 12-year Activity Cycle for the Nearby Planet Host Star HD 219134". The Astrophysical Journal. 821 (2): 74. arXiv:1602.05200. Bibcode:2016ApJ...821...74J. doi:10.3847/0004-637X/821/2/74.