Gas giant · HD 222237

HD 222237 b

ExoplanetsDiscovered 2024

Scientific overview

HD 222237 b is a gas giant orbiting HD 222237, completing an orbit every 14892 days, about 37 light-years from Earth. It was discovered in 2024 using the radial velocity method.

Host star

HD 222237

Spectral type

K3 V

Temperature

4,751 K

Mass

0.76 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2024

Knowledge connections

OrbitsHD 222237
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Gas giant
Host star: HD 222237
Discovery method: Radial Velocity Method
Discovery year: 2024
Orbital period: 14892 d
Semi-major axis: 10.8 AU
Eccentricity: 0.56
Radius: 12.8 R⊕
Mass: 1649.53 M⊕
Density: 4.34 g/cm³ · derived
Equilibrium temp.: 59 K
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 density4.34 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 1649.53 M⊕ · NASA
- radiusEarth = 12.8 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.