Terrestrial planet · GJ 887

GJ 887 e

ExoplanetsDiscovered 2026

Scientific overview

GJ 887 e is a terrestrial planet orbiting GJ 887, completing an orbit every 4 days, about 11 light-years from Earth. It was discovered in 2026 using the radial velocity method.

Host star

GJ 887

Spectral type

M1 V

Temperature

3,688 K

Mass

0.495 M☉

Planetary system — GJ 887 system

View the GJ 887 system (4 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
GJ 887 eRadial Velocity · 2026	Terrestrial planet	1.12	4.4249	11
GJ 887 bRadial Velocity · 2020	Super-Earth	1.8	9.2619	11
GJ 887 cRadial Velocity · 2020	Mini-Neptune	2.43	21.784	11
GJ 887 dRadial Velocity · 2026	Super-Earth	2.34	50.77	11

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2026

Knowledge connections

OrbitsGJ 887
Member of systemGJ 887 system
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Terrestrial planet
Host star: GJ 887
Discovery method: Radial Velocity Method
Discovery year: 2026
Orbital period: 4.4249 d
Semi-major axis: 0.0417 AU
Radius: 1.12 R⊕
Mass: 1.46 M⊕
Density: 5.73 g/cm³ · derived
Equilibrium temp.: 544 K
Insolation: 20.9 S⊕
Distance: 11 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 density5.73 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 1.46 M⊕ · NASA
- radiusEarth = 1.12 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.