SPECULOOS-3 b
Description: SPECULOOS-3 b is an Earth-sized exoplanet, orbiting the ultracool red dwarf star SPECULOOS-3. It is relatively close to Earth, at a distance of 55 light-years. SPECULOOS-3 b takes only about 17 hours to complete an orbit around SPECULOOS-3, and, because of that proximity, it receives very high levels of radiation and is tidally locked, meaning that one side of the planet always faces its host star. Its discovery was made using the SPECULOOS project, and announced in May 2024 in the academic journal Nature Astronomy.
Physical Properties
Mass (Jupiter mass): Unknown
Radius (Jupiter radius): 0.087 RJ
Density: 5.27 g/cm³
Equilibrium Temperature: 553.0 K
Orbital Parameters
Orbital Period: 0.71912603 days
Semi-major Axis: 0.00733 AU
Eccentricity: Unknown
Inclination: 89.44°
Host Star Properties
Host Star: SPECULOOS-3
Spectral Type: M6.5+/-0.5
Temperature: 2800.0 K
Stellar Mass: 0.1 M☉
Stellar Radius: 0.12 R☉
Discovery Information
Planet Letter: b
Object ID: 3.19845
Host ID: 2.579436
Discovery Date: 2024-05
Discovery Year: 2024
Discovery Method: Transit
Discovery Locale: Ground
Discovery Facility: SPECULOOS Southern Observatory
Discovery Instrument: Multiple Instruments