Terrestrial planet · GJ 806

GJ 806 b

ExoplanetsDiscovered 2023

Scientific overview

GJ 806 b is a terrestrial planet orbiting GJ 806, completing an orbit every 0.9263 days, about 39 light-years from Earth. It was discovered in 2023 using the transit method.

Host star

GJ 806

Spectral type

M1.5 V

Temperature

3,600 K

Mass

0.413 M☉

Planetary system — GJ 806 system

View the GJ 806 system (2 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
GJ 806 bTransit · 2023	Terrestrial planet	1.33	0.9263	39
GJ 806 cRadial Velocity · 2023	Super-Earth	2.28	6.6406	39

Discovery and detection

Detection method

Transit Method

Discovery year

2023

Discovered at

TESS

Knowledge connections

OrbitsGJ 806
Member of systemGJ 806 system
Discovered by methodTransit Method
Discovered by missionTESS
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Terrestrial planet
Host star: GJ 806
Discovery method: Transit Method
Discovery year: 2023
Orbital period: 0.9263 d
Semi-major axis: 0.0141 AU
Radius: 1.33 R⊕
Mass: 1.9 M⊕
Density: 4.45 g/cm³ · derived
Equilibrium temp.: 940 K
Insolation: 130 S⊕
Distance: 39 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 density4.45 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 1.9 M⊕ · NASA
- radiusEarth = 1.33 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.