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TOI-1291 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-1291 b

Confirmed exoplanet · Neptune Like

TOI-1291 b

Orbiting TOI-1291

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

NASA Archive record ↗Back to catalog →

Generic neptune like catalog artwork; not a direct image of TOI-1291 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,026
Method: Transit
Radius: 5.638264 R⊕
Mass: 27.1 M⊕
Orbit: 7.16201 days
Distance: 428.123 pc

Planet profile

Orbit and physical properties

Orbital period: 7.16201 days
Semi-major axis: Not reported by the NASA Exoplanet Archive
Eccentricity: Not reported by the NASA Exoplanet Archive
Radius: 5.638264 Earth radii
Mass: 27.1 Earth masses
Mass provenance: M-R relationship
Density: 0.831 g/cm³
Equilibrium temperature: 1,649 K
Insolation: 1,230.42 Earth flux

Host system

Star and system properties

Host star: TOI-1291
Stars in system: 1
Known planets in system: 1
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: 6,139.95 K
Stellar radius: 1.8109 R☉
Stellar mass: 1.2 M☉
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 428.123 parsecs
Right ascension: 16h23m16.32s
Declination: +62d55m30.44s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,026
Publication date: 2026-05
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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