Mini-Neptune · Gl 686

Gl 686 b

ExoplanetsDiscovered 2018

Scientific overview

Gl 686 b is a mini-neptune orbiting Gl 686, completing an orbit every 16 days, about 27 light-years from Earth. It was discovered in 2018 using the radial velocity method.

Host star

Gl 686

Spectral type

M1.0 V

Temperature

3,656 K

Mass

0.426 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2018

Discovered at

Roque de los Muchachos Observatory

Knowledge connections

OrbitsGl 686
Discovered by methodRadial Velocity Method
Discovered atRoque de los Muchachos Observatory
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Mini-Neptune
Host star: Gl 686
Discovery method: Radial Velocity Method
Discovery year: 2018
Orbital period: 15.53 d
Semi-major axis: 0.091 AU
Eccentricity: 0.05
Radius: 2.46 R⊕
Mass: 6.62 M⊕
Density: 2.45 g/cm³ · derived
Equilibrium temp.: 379 K
Insolation: 3.56 S⊕
Distance: 27 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 density2.45 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 6.62 M⊕ · NASA
- radiusEarth = 2.46 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.