STATION 02: EXOPLANETLEDGER.ORG · WORLD DOSSIER // SPECULOOS-3 b
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CONFIRMED EXOPLANET · Terrestrial

SPECULOOS-3 b

Orbits Host Star: SPECULOOS-3 (Type M6.5+/-0.5)
Planetary Radius
0.977 R⊕
Planetary Mass
0.894 M⊕
Surface Gravity
0.94 g / g⊕
Equilibrium Temp
553K (+280°C / +536°F)
Orbital Period
0.719 days
Discovery Year
2024 (Transit)

Habitability Assessment

⚠️ Thermal Exclusions: High equilibrium temperature (553 K · +280°C / +536°F) places this world well interior to the runaway greenhouse threshold.

Discovery Facility: SPECULOOS Southern Observatory.

NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS
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