Neptune-like

HD 219134 g

Orbiting HD 219134 | 6.5 parsecs away

HD 219134 g is a Neptune-like exoplanet (an ice giant with a thick atmosphere) with a mass of 10.8 Earth masses. The planet completes one orbit around its star every 94.2 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.

More Neptune-like planets →Radial Velocity method →

2015

Discovered

10.8

Earth Masses

Discovery Information

Discovery MethodRadial Velocity

Discovery Year2,015

Discovery FacilityMultiple Observatories

Orbital Properties

Orbital Period94.2 days

Semi-Major Axis0.3753 AU

Eccentricity0

Physical Properties

Mass (Jupiter)0.034 MJ

Mass (Earth)10.8062 M⊕

Planetary Extremes

Where HD 219134 g sits on the spectrum of all known exoplanets.

Mass10.8 M⊕

FeatherweightColossus

Year Length94.2 days

LightningGlacial

Star Distance0.375 AU

ScorchedFrozen exile

Star System View

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Orbit Comparison

Earth: 365.25 days (1 AU)HD 219134 g: 94.2 Earth days (0.375 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

Planets in the HD 219134 System

HD 219134 bSuper-Earth

0.039 AU3.1 d

HD 219134 cSuper-Earth

0.065 AU6.8 d

HD 219134 fSuper-Earth

0.146 AU22.7 d

HD 219134 dSuper-Earth

0.237 AU46.9 d

HD 219134 gNeptune-like(viewing)

0.375 AU94.2 d

HD 219134 hGas Giant

3.110 AU2247.0 d

View on NASA Archive Compare with Other Planets

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Related Research

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