Mini-Neptune · GJ 163

GJ 163 c

ExoplanetsDiscovered 2013

Scientific overview

GJ 163 c is a mini-neptune orbiting GJ 163, completing an orbit every 26 days, about 49 light-years from Earth. It was discovered in 2013 using the radial velocity method.

Host star

GJ 163

Spectral type

Temperature

3,500 K

Mass

0.4 M☉

Planetary system — GJ 163 system

View the GJ 163 system (3 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
GJ 163 bRadial Velocity · 2013	Mini-Neptune	3.25	8.6318	49
GJ 163 cRadial Velocity · 2013	Mini-Neptune	2.5	25.6306	49
GJ 163 dRadial Velocity · 2013	Gas giant	5.92	604	49

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2013

Discovered at

La Silla Observatory

Knowledge connections

OrbitsGJ 163
Member of systemGJ 163 system
Discovered by methodRadial Velocity Method
Discovered atLa Silla Observatory
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Mini-Neptune
Host star: GJ 163
Discovery method: Radial Velocity Method
Discovery year: 2013
Orbital period: 25.6306 d
Semi-major axis: 0.1254 AU
Eccentricity: 0.099
Radius: 2.5 R⊕
Mass: 6.8 M⊕
Density: 2.40 g/cm³ · derived
Equilibrium temp.: 305 K
Insolation: 1.25 S⊕
Distance: 49 ly

Density is derived from the archive mass and radius via ρ = M / (4⁄3·π·r³); all other values are catalogued measurements.

Derived values

Computed from source-backed inputs via standard formulae — not observations. Every input and constant is traced below.

Bulk density2.40 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 6.8 M⊕ · NASA
- radiusEarth = 2.5 R⊕ · NASA
Assumptions: M⊕ = 5.972e+24 kg, R⊕ = 6371000 m (IAU 2015 B3 nominal); Assumes a uniform sphere.
Limitations: Withheld above 30 g/cm³ (inconsistent mass/radius inputs).; Archive mass/radius carry no propagated uncertainty here.
Uncertainty: not propagated (inputs carry no catalogued uncertainty)
Computed as of 2026-06-29.

Quality & authority

Partial

Unreviewed

Description: Complete
Source coverage: Partial
Relationship coverage: Complete
Review coverage: None
Citation coverage: None
Image coverage: Not applicable

Data from the NASA Exoplanet Archive. See source quality.