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HD 219134 d is a Super-Earth exoplanet (a planet larger than Earth but smaller than Neptune), about 1.6 times the radius of Earth. It has an equilibrium temperature of 411 K (138°C). The planet completes one orbit around its star every 46.9 Earth days. It was discovered in 2015 using the radial velocity method. It orbits the K-type star HD 219134, located approximately 7 parsecs (21 light-years) from Earth.
2015
Discovered
16.2
Earth Masses
1.61
Earth Radii
411
Temperature (K)
Discovery Information
Discovery MethodRadial Velocity
Discovery Year2,015
Discovery FacilityRoque de los Muchachos Observatory
Orbital Properties
Orbital Period46.859 days
Semi-Major Axis0.237 AU
Eccentricity0.138
Physical Properties
Mass (Jupiter)0.0509 MJ
Mass (Earth)16.17 M⊕
Radius (Jupiter)0.1436 RJ
Radius (Earth)1.61 R⊕
Eq. Temperature410.5 K
Insolation Flux4.72 S⊕
Planetary Extremes
Where HD 219134 d sits on the spectrum of all known exoplanets.
Mass16.2 M⊕
FeatherweightColossus
Radius1.61 R⊕
TinyEnormous
Temperature411 K
FrozenInferno
Year Length46.9 days
LightningGlacial
Star Distance0.237 AU
ScorchedFrozen exile
Star System View
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Size Comparison
1.61x Earth's radius (0.14x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)HD 219134 d: 46.9 Earth days (0.237 AU)
Host Star: HD 219134
Spectral TypeK3 V
Effective Temperature4,913 K
Mass0.794 M☉
Radius0.77 R☉
Size vs Sun1.30x smaller
Luminosity0.31 L☉
Luminosity vs Sun3.2x dimmer
Metallicity [Fe/H]0.08
Distance (pc)6.5313 pc
Distance (ly)21.3 light-years
What If You Lived Here?
436.7 kg
Your weight (from 70 kg)
6.24g
Lethal
No human could survive. You'd be pinned to the ground.
46.9 Earth days
Year length
Orange sunrise
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