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

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TOI-1203 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TOI-1203 b

Confirmed exoplanet · Super Earth

TOI-1203 b

Orbiting TOI-1203

Discovered in 2025 using Radial Velocity. 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-1203 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Radial Velocity
Radius: 1.52 R⊕
Mass: 3.51 M⊕
Orbit: 4.157289 days
Distance: 64.9943 pc

Planet profile

Orbit and physical properties

Orbital period: 4.157289 days
Semi-major axis: 0.04869 AU
Eccentricity: 0.067
Radius: 1.52 Earth radii
Mass: 3.51 Earth masses
Mass provenance: Mass
Density: 5.48 g/cm³
Equilibrium temperature: 1,361.2 K
Insolation: 572.2 Earth flux

Host system

Star and system properties

Host star: TOI-1203
Stars in system: 1
Known planets in system: 4
Spectral type: G3 V
Stellar temperature: 5,737 K
Stellar radius: 1.179 R☉
Stellar mass: 0.886 M☉
Stellar metallicity: -0.39 dex
Stellar age: 12.5 Gyr
Distance: 64.9943 parsecs
Right ascension: 11h12m54.42s
Declination: -34d24m24.97s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,025
Publication date: 2025-09
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 3.6 m ESO Telescope
Instrument: HARPS Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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