HD 219134 h
HD 219134 h is a cold gas giant orbiting HD 219134 in the constellation Cassiopeia. It lies about 21 light-years from Earth and was discovered in 2015 using the radial velocity method.
Is HD 219134 h in the Habitable Zone?
HD 219134 h orbits beyond the outer edge of the habitable zone of HD 219134. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 219134: 0.408–1.000 AU (conservative: 0.517–0.948 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on HD 219134 h — one full orbit around HD 219134 — lasts 2,247.0 Earth days, longer than an Earth year. It orbits at an average distance of 3.110 AU. Its orbit is mildly elliptical (eccentricity 0.06).
How Was HD 219134 h Discovered?
HD 219134 h was discovered in 2015 using the radial velocity method, with observations from Roque de los Muchachos Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is HD 219134 h?
HD 219134 h is 21.3 light-years (6.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 2005. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 374,880 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. HD 219134 h scores 0.10, ranking #4,416 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 219134
HD 219134
- Surface temperature
- 4,699 K (Sun: 5,772 K)
- Mass
- 0.81 M☉
- Radius
- 0.78 R☉
- Luminosity
- 0.2646 L☉
- Age
- 11.0 billion years (Sun: 4.6)
The HD 219134 Planetary System
HD 219134 h is one of 6 known planets in the HD 219134 system. Its siblings:
- HD 219134 b (Super Earth)
- HD 219134 c (Super Earth)
- HD 219134 d (Super Earth)
- HD 219134 f (Super Earth)
- HD 219134 g (Neptune-like)
HD 219134 h — Complete Data
| Mass (best estimate) | 108.06 Earth masses |
|---|---|
| Orbital period | 2,247.00 days |
| Orbital distance | 3.110 AU |
| Eccentricity | 0.060 |
| Earth Similarity Index | 0.10 |
| Distance from Earth | 21.3 light-years (6.5 parsecs) |
| Constellation | Cassiopeia |
| Discovery method | Radial Velocity |
| Discovery facility | Roque de los Muchachos Observatory |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2015-11-18. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 219134 h
Is HD 219134 h habitable?
No — HD 219134 h orbits outside the habitable zone of HD 219134 and is likely too cold for liquid water on its surface.
How far away is HD 219134 h?
HD 219134 h is about 21 light-years from Earth in the constellation Cassiopeia. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 374,880 years to get there.
How long is a year on HD 219134 h?
One orbit around HD 219134 takes 2,247.0 Earth days.
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