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KOI-55 b is a Rocky exoplanet (a small, dense world with a solid surface), smaller than Earth at 0.76 Earth radii. The planet completes one orbit around its star every 5.8 hours. It was discovered in 2011 using the orbitalbrightnessmodulation method. It orbits the B-type star KOI-55, located approximately 1231 parsecs (4015 light-years) from Earth.
2011
Discovered
0.4
Earth Masses
0.76
Earth Radii
Discovery Information
Discovery MethodOrbital Brightness Modulation
Discovery Year2,011
Discovery FacilityKepler
Orbital Properties
Orbital Period0.2401 days
Semi-Major Axis0.006 AU
Inclination65 deg
Physical Properties
Mass (Jupiter)0.0014 MJ
Mass (Earth)0.44 M⊕
Radius (Jupiter)0.0677 RJ
Radius (Earth)0.759 R⊕
Planetary Extremes
Where KOI-55 b sits on the spectrum of all known exoplanets.
Mass0.4 M⊕
FeatherweightColossus
Radius0.76 R⊕
TinyEnormous
Year Length5.8 hrs
LightningGlacial
Star Distance6.0e-3 AU
ScorchedFrozen exile
Star System View
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Size Comparison
0.76x Earth's radius
Orbit Comparison
Earth: 365.25 days (1 AU)KOI-55 b: 5.8 hours (0.006 AU)
Host Star: KOI-55
Spectral TypeB
Effective Temperature27,730 K
Mass0.496 M☉
Radius0.203 R☉
Size vs Sun4.93x smaller
Luminosity22.9087 L☉
Luminosity vs Sun22.909x brighter
Distance (pc)1,231.02 pc
Distance (ly)4015.0 light-years
Planets in the KOI-55 System
What If You Lived Here?
53.5 kg
Your weight (from 70 kg)
0.76g
Light
Noticeably easier to move. You could jump much higher.
5.8 hours
Year length
Blue-White sunrise
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