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KOINTREAU-4 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/KOINTREAU-4 b

Confirmed exoplanet · Gas Giant

KOINTREAU-4 b

Orbiting 2MASS J16262785-2625152

Discovered in 2026 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 KOINTREAU-4 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,026
Method: Imaging
Radius: 12.2 R⊕
Mass: 4,862.774627 M⊕
Orbit: Not reported by the NASA Exoplanet Archive
Distance: 145.434 pc

Planet profile

Orbit and physical properties

Orbital period: Not reported by the NASA Exoplanet Archive
Semi-major axis: 182 AU
Eccentricity: Not reported by the NASA Exoplanet Archive
Radius: 12.2 Earth radii
Mass: 4,862.774627 Earth masses
Mass provenance: Mass
Density: 14.7 g/cm³
Equilibrium temperature: Not reported by the NASA Exoplanet Archive
Insolation: Not reported by the NASA Exoplanet Archive

Host system

Star and system properties

Host star: 2MASS J16262785-2625152
Stars in system: 1
Known planets in system: 1
Spectral type: M4.5
Stellar temperature: 3,252 K
Stellar radius: Not reported by the NASA Exoplanet Archive
Stellar mass: Not reported by the NASA Exoplanet Archive
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: 0.0113 Gyr
Distance: 145.434 parsecs
Right ascension: 16h26m27.85s
Declination: -26d25m15.58s

Discovery

Detection and provenance

Discovery method: Imaging
Discovery year: 2,026
Publication date: 2026-03
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck II Telescope
Instrument: NIRC2 Camera
NASA Exoplanet Archive: Open composite record ↗

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