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Missions Planets Black Holes 3D Map Agencies Blog About apexandromeda.com

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HD 100508 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 100508 b

Confirmed exoplanet · Gas Giant

HD 100508 b

Orbiting HD 100508

Discovered in 2026 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of HD 100508 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,026
Method: Radial Velocity
Radius: 13.7 R⊕
Mass: 381.394088 M⊕
Orbit: 5,681 days
Distance: 32.7548 pc

Planet profile

Orbit and physical properties

Orbital period: 5,681 days
Semi-major axis: 6.11 AU
Eccentricity: 0.42
Radius: 13.7 Earth radii
Mass: 381.394088 Earth masses
Mass provenance: Mass
Density: 0.815 g/cm³
Equilibrium temperature: 106.66 K
Insolation: 0.0216 Earth flux

Host system

Star and system properties

Host star: HD 100508
Stars in system: 1
Known planets in system: 1
Spectral type: K1 IV
Stellar temperature: 5,419 K
Stellar radius: 1.0179 R☉
Stellar mass: 0.94 M☉
Stellar metallicity: 0.33 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 32.7548 parsecs
Right ascension: 11h33m12.34s
Declination: -67d03m16.70s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,026
Publication date: 2026-03
Discovery locale: Ground
Facility: Las Campanas Observatory
Telescope: 6.5 m Magellan II Clay Telescope
Instrument: Carnegie Planet Finder Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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