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TOI-5261 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-5261 b

Confirmed exoplanet · Gas Giant

TOI-5261 b

Orbiting TOI-5261

Discovered in 2025 using Transit. 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 TOI-5261 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Transit
Radius: 11.601295 R⊕
Mass: 3,651.848396 M⊕
Orbit: 4.150977 days
Distance: 377.054 pc

Planet profile

Orbit and physical properties

Orbital period: 4.150977 days
Semi-major axis: 0.05134 AU
Eccentricity: 0.1585
Radius: 11.601295 Earth radii
Mass: 3,651.848396 Earth masses
Mass provenance: Mass
Density: 12.9 g/cm³
Equilibrium temperature: 1,244 K
Insolation: 159.592 Earth flux

Host system

Star and system properties

Host star: TOI-5261
Stars in system: 1
Known planets in system: 1
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: 5,790 K
Stellar radius: 1.021 R☉
Stellar mass: 1.037 M☉
Stellar metallicity: 0.254 dex
Stellar age: 4.2 Gyr
Distance: 377.054 parsecs
Right ascension: 20h21m50.05s
Declination: +19d26m09.05s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,025
Publication date: 2025-10
Discovery locale: Space
Facility: Transiting Exoplanet Survey Satellite (TESS)
Telescope: 0.1 m TESS Telescope
Instrument: TESS CCD Array
NASA Exoplanet Archive: Open composite record ↗

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