Hot Jupiter · HD 75289

HD 75289 b

ExoplanetsDiscovered 1999

Scientific overview

HD 75289 b is a hot jupiter orbiting HD 75289, completing an orbit every 4 days, about 95 light-years from Earth. It was discovered in 1999 using the radial velocity method.

Host star

HD 75289

Spectral type

Temperature

6,117 K

Mass

1.29 M☉

Discovery and detection

Detection method

Radial Velocity Method

Discovery year

1999

Discovered at

La Silla Observatory

Knowledge connections

OrbitsHD 75289
Discovered by methodRadial Velocity Method
Discovered atLa Silla Observatory
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Hot Jupiter
Host star: HD 75289
Discovery method: Radial Velocity Method
Discovery year: 1999
Orbital period: 3.5093 d
Semi-major axis: 0.05 AU
Eccentricity: 0.03
Radius: 14.2 R⊕
Mass: 155.74 M⊕
Density: 0.30 g/cm³ · derived
Equilibrium temp.: 1260 K
Insolation: 821.35 S⊕
Distance: 95 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 density0.30 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 155.74 M⊕ · NASA
- radiusEarth = 14.2 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.