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2019
Discovered
1.20
Earth Radii
518
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,019
Discovery FacilityTransiting Exoplanet Survey Satellite (TESS)
Orbital Properties
Orbital Period3.9306 days
Semi-Major Axis0.036 AU
Inclination89.228 deg
Physical Properties
Radius (Jupiter)0.1071 RJ
Radius (Earth)1.2 R⊕
Eq. Temperature518 K
Planetary Extremes
Where GJ 357 b sits on the spectrum of all known exoplanets.
Radius1.20 R⊕
TinyEnormous
Temperature518 K
FrozenInferno
Year Length3.9 days
LightningGlacial
Star Distance0.036 AU
ScorchedFrozen exile
Size Comparison
1.20x Earth's radius (0.11x Jupiter)
Orbit Comparison
Earth: 365.25 days (1 AU)GJ 357 b: 3.9 Earth days (0.036 AU)
Host Star: GJ 357
Spectral TypeM2.5 V
Effective Temperature3,505 K
Mass0.342 M☉
Radius0.337 R☉
Size vs Sun2.97x smaller
Luminosity0.0159 L☉
Luminosity vs Sun62.9x dimmer
Metallicity [Fe/H]-0.12
Distance (pc)9.4418 pc
Distance (ly)30.8 light-years
Star System View
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Other Planets in the GJ 357 System
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