Gas giant · HD 3651

HD 3651 b

ExoplanetsDiscovered 2003

Scientific overview

HD 3651 b is a gas giant orbiting HD 3651, completing an orbit every 62 days, about 36 light-years from Earth. It was discovered in 2003 using the radial velocity method.

Host star

HD 3651

Spectral type

K0 V

Temperature

5,221 K

Mass

0.799 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2003

Knowledge connections

OrbitsHD 3651
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Gas giant
Host star: HD 3651
Discovery method: Radial Velocity Method
Discovery year: 2003
Orbital period: 62.25 d
Semi-major axis: 0.295 AU
Eccentricity: 0.645
Radius: 10.1 R⊕
Mass: 72.47 M⊕
Density: 0.39 g/cm³ · derived
Equilibrium temp.: 433 K
Insolation: 6.11 S⊕
Distance: 36 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 density0.39 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 72.47 M⊕ · NASA
- radiusEarth = 10.1 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.