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Kepler-1217 b is a Super-Earth exoplanet (a planet larger than Earth but smaller than Neptune), about 2.0 times the radius of Earth. The planet completes one orbit around its star every 2.0 Earth days. It was discovered in 2016 using the transit method. It orbits the star Kepler-1217, located approximately 1348 parsecs (4396 light-years) from Earth.
2016
Discovered
1.99
Earth Radii
Discovery Information
Discovery MethodTransit
Discovery Year2,016
Discovery FacilityKepler
Orbital Properties
Orbital Period2.0323 days
Semi-Major Axis0.032 AU
Physical Properties
Radius (Jupiter)0.1775 RJ
Radius (Earth)1.99 R⊕
Planetary Extremes
Where Kepler-1217 b sits on the spectrum of all known exoplanets.
Radius1.99 R⊕
TinyEnormous
Year Length2.0 days
LightningGlacial
Star Distance0.032 AU
ScorchedFrozen exile
Star System View
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Size Comparison
1.99x Earth's radius (0.18x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)Kepler-1217 b: 2.0 Earth days (0.032 AU)
Host Star: Kepler-1217
Effective Temperature5,905 K
Mass1.06 M☉
Radius1.08 R☉
Size vs Sun1.08x larger
Metallicity [Fe/H]0.07
Distance (pc)1,347.71 pc
Distance (ly)4395.6 light-years
Planets in the Kepler-1217 System
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