Back to Catalog
Kepler-1921 c is a Super-Earth exoplanet (a planet larger than Earth but smaller than Neptune), about 1.4 times the radius of Earth. Its scorching equilibrium temperature of 1791 K (1518°C) makes it far too hot for liquid water. Despite its name, Super-Earths are not necessarily habitable; the term refers only to size. The planet completes one orbit around its star every 3.2 Earth days. It was discovered in 2023 using the transit method. It orbits the star Kepler-1921, located approximately 929 parsecs (3030 light-years) from Earth.
2023
Discovered
1.41
Earth Radii
1791
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,023
Discovery FacilityKepler
Orbital Properties
Orbital Period3.1572 days
Semi-Major Axis0.0454 AU
Eccentricity0
Inclination89.99 deg
Physical Properties
Radius (Jupiter)0.1258 RJ
Radius (Earth)1.41 R⊕
Eq. Temperature1,791 K
Insolation Flux2,436.47 S⊕
Planetary Extremes
Where Kepler-1921 c sits on the spectrum of all known exoplanets.
Radius1.41 R⊕
TinyEnormous
Temperature1791 K
FrozenInferno
Year Length3.2 days
LightningGlacial
Star Distance0.045 AU
ScorchedFrozen exile
Star System View
Loading 3D view...
Size Comparison
1.41x Earth's radius (0.13x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)Kepler-1921 c: 3.2 Earth days (0.045 AU)
Host Star: Kepler-1921
Effective Temperature6,120 K
Mass1.251 M☉
Radius2 R☉
Size vs Sun2.00x larger
Metallicity [Fe/H]0.02
Distance (pc)928.989 pc
Distance (ly)3030.0 light-years
Planets in the Kepler-1921 System
Test Your Knowledge
Related Research
Loading papers...