HD 219134 d
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | HR 8832 | |
Constellation | Cassiopeia | |
Right ascension | (α) | 23h 13m 16.97632s |
Declination | (δ) | +57° 10′ 06.0823″ |
Apparent magnitude | (mV) | 5.574 |
Distance | 21.25 ly (6.52 pc) | |
Spectral type | K3 V | |
Temperature | (T) | 4710 K |
Observed separation | ||
Orbital elements | ||
Semi-major axis | (a) | 0.234 ± 0.002[1] AU |
Eccentricity | (e) | 0.32 ± 0.14[1] |
Orbital period | (P) | 46.78 ± 0.16[1] d |
Inclination | (i) | null[1]° |
Physical characteristics | ||
Mass | (m) | 8.67 ± 1.14[1] M⊕ |
Discovery information | ||
Discovery date | 2015 July 30 | |
Discoverer(s) | ||
Discovery method | radial velocity method (HARPS-N); | |
Discovery site | HARPS-N of the Telescopio Nazionale Galileo | |
Discovery status | Published |
HD 219134 d, also known as HR 8832 d, is an exoplanet orbiting around the K-type star HR 8832 in the constellation of Cassiopeia. It has a mass of 8.67 Earth Masses, which means that this planet may be a Super-Earth if rocky, a Water world, or a Mini-Neptune if gaseous. 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 it has not been observed by the Spitzer telescope and thus its radius and density are unknown.
![](../I/m/PIA19832-StarHD219134-Location-20150730.jpg)
References
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