HD 219134 h
Planet· orbits HD 219134
HD 219134 h - the outermost planet, a cold Saturn-mass giant (minimum mass ~108 Earth, ~0.34 Jupiter) on a wide six-year orbit. RV-only: minimum mass, model-estimate size, never imaged.
Open in 3D viewSee HD 219134 h in the live, interactive 3D map
Key facts
Minimum mass
6.45 × 10²⁶ kg
0.34 M♃ (108 M⊕)
Year
6.15 Earth years
2,247 Earth days
Distance from HD 219134
3.11 AU
Science
Physical
- Minimum mass (m·sin i)
- 6.45 × 10²⁶ kg · 0.34 M♃ (108 M⊕)
- Radial-velocity detection measures m·sin i; the true mass depends on the unknown orbital inclination.
- Radius
- Not measured
- No transit — radius is a model estimate for a ~0.34-Jupiter giant; no density is quoted.
Orbital
- Semi-major axis
- 3.11 AU
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.06
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 6.15 years
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 2.92 AU
- Computed from the orbital elements
- Aphelion
- 3.3 AU
- Computed from the orbital elements
- Mean orbital velocity
- 15.1 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A cold gas/ice giant of minimum mass ~108 Earth (~0.34 Jupiter) on a wide orbit; never imaged.
- Cloud appearance
- Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The banded clouds shown are a representation of its class, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 0.0274 S⊕ · 3% of the sunlight Earth receives
- Computed from HD 219134's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 118 K (-155 °C)
- Computed model value for its cold six-year orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'h' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order they are discovered (the star itself is the unwritten 'a').
The long-period giant of the system, announced in 2015 from a slow radial-velocity trend.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.