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TOI-6478 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-6478 b

Confirmed exoplanet · Neptune Like

TOI-6478 b

Orbiting TOI-6478

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-6478 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Transit
Radius: 4.6 R⊕
Mass: 19.2 M⊕
Orbit: 34.005019 days
Distance: 38.6057 pc

Planet profile

Orbit and physical properties

Orbital period: 34.005019 days
Semi-major axis: 0.1136 AU
Eccentricity: Not reported by the NASA Exoplanet Archive
Radius: 4.6 Earth radii
Mass: 19.2 Earth masses
Mass provenance: M-R relationship
Density: 1.08 g/cm³
Equilibrium temperature: 204.4 K
Insolation: 0.0003 Earth flux

Host system

Star and system properties

Host star: TOI-6478
Stars in system: 2
Known planets in system: 1
Spectral type: M4.0+/-0.5
Stellar temperature: 3,230 K
Stellar radius: 0.234 R☉
Stellar mass: 0.23 M☉
Stellar metallicity: -0.53 dex
Stellar age: 6 Gyr
Distance: 38.6057 parsecs
Right ascension: 09h59m58.03s
Declination: -16d09m35.26s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,025
Publication date: 2025-06
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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