HD 219134 b

HD 219134 b
An artist's impression of the hot rocky exoplanet HD 219134 b.
Discovery
Discovery siteHARPS-N of the Telescopio Nazionale Galileo
Discovery date30 July 2015
radial velocity method (HARPS-N)
Orbital characteristics
0.038764 (± 0.0047)[1] AU
Eccentricity0 (fixed)[1]
3.092926 (± 0.0004)[1] d
Inclination85.058 ± 0.08[1]
StarHD 219134
Physical characteristics
1.602±0.055[2] R🜨
Mass4.74 (± 0.19)[1] ME
Mean density
6.36 (± 0.72)[1] g cm−3
1.847 +0.213
−0.19
g
Temperature1,015 K (742 °C; 1,367 °F)

HD 219134 b (or HR 8832 b) is one of at least five exoplanets orbiting HD 219134, a main-sequence star in the constellation of Cassiopeia.[3][1][4][5] HD 219134 b has a size of about 1.6 R🜨, and a density of 6.4 g/cm3 and orbits at 21.25 light-years away.[3] The exoplanet was initially detected by the instrument HARPS-N of the Italian Telescopio Nazionale Galileo via the radial velocity method and subsequently observed by the Spitzer telescope as transiting in front of its star.[3][4] The exoplanet has a mass of about 4.5 times that of Earth and orbits its host star every three days.[3] In 2017, it was found that the planet likely hosts an atmosphere.

  1. ^ a b c d e f g Motalebi, F.; et al. (2015). "The HARPS-N Rocky Planet Search, I. HD 219134b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun" (PDF). Astronomy & Astrophysics. 584: A72. arXiv:1507.08532. Bibcode:2015A&A...584A..72M. doi:10.1051/0004-6361/201526822. S2CID 45652878.
  2. ^ Cite error: The named reference Gillon2017 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference NASA-20150730-fc was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference NASA-20150730 was invoked but never defined (see the help page).
  5. ^ "HD 219134". exoplanetarchive.ipac.caltech.edu.