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HD 143811 AB b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 143811 AB b

Confirmed exoplanet · Gas Giant

HD 143811 AB b

Orbiting HD 143811 A

Discovered in 2025 using Imaging. 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 143811 AB b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Imaging
Radius: 15.692573 R⊕
Mass: 1,938.753283 M⊕
Orbit: 117,000 days
Distance: 136.608 pc

Planet profile

Orbit and physical properties

Orbital period: 117,000 days
Semi-major axis: 63 AU
Eccentricity: 0.19
Radius: 15.692573 Earth radii
Mass: 1,938.753283 Earth masses
Mass provenance: Mass
Density: 2.76 g/cm³
Equilibrium temperature: 1,042 K
Insolation: 0.0011 Earth flux

Host system

Star and system properties

Host star: HD 143811 A
Stars in system: 2
Known planets in system: 1
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: 6,791 K
Stellar radius: 1.68398 R☉
Stellar mass: 1.32 M☉
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: 0.018 Gyr
Distance: 136.608 parsecs
Right ascension: 16h03m33.41s
Declination: -30d08m13.77s

Discovery

Detection and provenance

Discovery method: Imaging
Discovery year: 2,025
Publication date: 2025-10
Discovery locale: Ground
Facility: Paranal Observatory
Telescope: 8.2 m ESO VLT UT3 Melipal Telescope
Instrument: SPHERE
NASA Exoplanet Archive: Open composite record ↗

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