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TOI-5817 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-5817 b

Confirmed exoplanet · Neptune Like

TOI-5817 b

Orbiting TOI-5817

Discovered in 2025 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-5817 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Transit
Radius: 3.08 R⊕
Mass: 10.3 M⊕
Orbit: 15.61031 days
Distance: 80.7542 pc

Planet profile

Orbit and physical properties

Orbital period: 15.61031 days
Semi-major axis: 0.1223 AU
Eccentricity: 0.2
Radius: 3.08 Earth radii
Mass: 10.3 Earth masses
Mass provenance: Mass
Density: 1.93 g/cm³
Equilibrium temperature: 950 K
Insolation: 126.8632 Earth flux

Host system

Star and system properties

Host star: TOI-5817
Stars in system: 2
Known planets in system: 1
Spectral type: G2 IV-V
Stellar temperature: 5,770 K
Stellar radius: 1.427 R☉
Stellar mass: 0.97 M☉
Stellar metallicity: -0.24 dex
Stellar age: 9.7 Gyr
Distance: 80.7542 parsecs
Right ascension: 21h29m30.67s
Declination: +21d28m28.30s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,025
Publication date: 2025-09
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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