 An artist's impression of the hot rocky exoplanet HD 219134 b. | |
| Discovery | |
|---|---|
| Discovery site | HARPS-N of the Telescopio Nazionale Galileo |
| Discovery date | 30 July 2015 |
| radial velocity method (HARPS-N) | |
| Orbital characteristics | |
| 0.038764 (± 0.0047)[1] AU | |
| Eccentricity | 0 (fixed)[1] |
| 3.092926 (± 0.0004)[1] d | |
| Inclination | 85.058 ± 0.08[1] |
| Star | HD 219134 |
| Physical characteristics | |
| 1.602±0.055[2] R🜨 | |
| Mass | 4.74 (± 0.19)[1] ME |
Mean density | 6.36 (± 0.72)[1] g cm−3 |
| 1.847 +0.213 −0.19 g | |
| Temperature | 1,015 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.
- ^ 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.
- ^ Cite error: The named reference
Gillon2017was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
NASA-20150730-fcwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
NASA-20150730was invoked but never defined (see the help page). - ^ "HD 219134". exoplanetarchive.ipac.caltech.edu.