Super-Earth · Ross 508

Ross 508 b

ExoplanetsDiscovered 2022

Scientific overview

Ross 508 b is a super-earth orbiting Ross 508, completing an orbit every 11 days, about 37 light-years from Earth. It was discovered in 2022 using the radial velocity method.

Host star

Ross 508

Spectral type

M4.5 V

Temperature

3,071 K

Mass

0.177 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2022

Discovered at

Subaru Telescope

Knowledge connections

OrbitsRoss 508
Discovered by methodRadial Velocity Method
Discovered atSubaru Telescope
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Super-Earth
Host star: Ross 508
Discovery method: Radial Velocity Method
Discovery year: 2022
Orbital period: 10.77 d
Semi-major axis: 0.0537 AU
Eccentricity: 0.33
Radius: 1.83 R⊕
Mass: 4 M⊕
Density: 3.60 g/cm³ · derived
Equilibrium temp.: 294 K
Insolation: 1.25 S⊕
Distance: 37 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 density3.60 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 4 M⊕ · NASA
- radiusEarth = 1.83 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.