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Missions Planets Black Holes 3D Map Agencies Blog About apexandromeda.com

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TOI-2257 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-2257 b

Confirmed exoplanet · Super Earth

TOI-2257 b

Orbiting TOI-2257

Discovered in 2021 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic super earth catalog artwork; not a direct image of TOI-2257 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,021
Method: Transit
Radius: 2.194 R⊕
Mass: 5.45 M⊕
Orbit: 35.189346 days
Distance: 57.7911 pc

Planet profile

Orbit and physical properties

Orbital period: 35.189346 days
Semi-major axis: 0.145 AU
Eccentricity: 0.496
Radius: 2.194 Earth radii
Mass: 5.45 Earth masses
Mass provenance: M-R relationship
Density: 2.84 g/cm³
Equilibrium temperature: 256 K
Insolation: 0.6703 Earth flux

Host system

Star and system properties

Host star: TOI-2257
Stars in system: 1
Known planets in system: 1
Spectral type: M3
Stellar temperature: 3,430 K
Stellar radius: 0.313 R☉
Stellar mass: 0.328 M☉
Stellar metallicity: -0.27 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 57.7911 parsecs
Right ascension: 12h58m57.51s
Declination: +77d39m42.18s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,021
Publication date: 2022-01
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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