Terrestrial planet · Gl 725 A

Gl 725 A b

ExoplanetsDiscovered 2025

Scientific overview

Gl 725 A b is a terrestrial planet orbiting Gl 725 A, completing an orbit every 11 days, about 11 light-years from Earth. It was discovered in 2025 using the radial velocity method.

Host star

Struve 2398 A

Spectral type

Temperature

3,433 K

Mass

0.33 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2025

Knowledge connections

OrbitsStruve 2398 A
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Terrestrial planet
Host star: Struve 2398 A
Discovery method: Radial Velocity Method
Discovery year: 2025
Orbital period: 11.2201 d
Semi-major axis: 0.068 AU
Eccentricity: 0
Radius: 1.48 R⊕
Mass: 2.78 M⊕
Density: 4.73 g/cm³ · derived
Equilibrium temp.: 376 K
Insolation: 3.36 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 density4.73 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 2.78 M⊕ · NASA
- radiusEarth = 1.48 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.