Gas giant · 47 UMa

47 UMa d

ExoplanetsDiscovered 2009

Scientific overview

47 UMa d is a gas giant orbiting 47 UMa, completing an orbit every 14002 days, about 45 light-years from Earth. It was discovered in 2009 using the radial velocity method.

Host star

Chalawan

Spectral type

G0V

Temperature

5,872 K

Mass

1.06 M☉

Planetary system — 47 UMa system

View the 47 UMa system (3 known planets).

Planet	Class	Radius (R⊕)	Period (d)	Distance (ly)
47 UMa bRadial Velocity · 1996	Gas giant	13.2	1078	45
47 UMa cRadial Velocity · 2001	Gas giant	14.2	2391	45
47 UMa dRadial Velocity · 2009	Gas giant	13.5	14002	45

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

2009

Knowledge connections

OrbitsChalawan
Member of system47 UMa system
Discovered by methodRadial Velocity Method
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Gas giant
Host star: Chalawan
Discovery method: Radial Velocity Method
Discovery year: 2009
Orbital period: 14002 d
Semi-major axis: 11.6 AU
Eccentricity: 0.16
Radius: 13.5 R⊕
Mass: 521.22 M⊕
Density: 1.17 g/cm³ · derived
Equilibrium temp.: 92 K
Insolation: 0.01 S⊕
Distance: 45 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 density1.17 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 521.22 M⊕ · NASA
- radiusEarth = 13.5 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.