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L 98-59 e is a Super-Earth exoplanet (a planet larger than Earth but smaller than Neptune) with a mass of 2.8 Earth masses. It has an equilibrium temperature of 347 K (74°C). The planet completes one orbit around its star every 12.8 Earth days. It was discovered in 2021 using the radial velocity method. It orbits the M-type star L 98-59, located approximately 11 parsecs (35 light-years) from Earth.
2021
Discovered
2.8
Earth Masses
347
Temperature (K)
Discovery Information
Discovery MethodRadial Velocity
Discovery Year2,021
Discovery FacilityMultiple Observatories
Orbital Properties
Orbital Period12.8278 days
Semi-Major Axis0.0712 AU
Eccentricity0.012
Inclination80 deg
Physical Properties
Mass (Jupiter)0.0089 MJ
Mass (Earth)2.82 M⊕
Density5.2 g/cm3
Eq. Temperature347 K
Insolation Flux2.4 S⊕
Planetary Extremes
Where L 98-59 e sits on the spectrum of all known exoplanets.
Mass2.8 M⊕
FeatherweightColossus
Temperature347 K
FrozenInferno
Year Length12.8 days
LightningGlacial
Density5.20 g/cm³
FluffyIron-dense
Star Distance0.071 AU
ScorchedFrozen exile
Star System View
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Orbit Comparison
Earth: 365.25 days (1 AU)L 98-59 e: 12.8 Earth days (0.071 AU)
Host Star: L 98-59
Spectral TypeM3 V
Effective Temperature3,415 K
Mass0.2923 M☉
Radius0.3155 R☉
Size vs Sun3.17x smaller
Luminosity0.0122 L☉
Luminosity vs Sun82.0x dimmer
Metallicity [Fe/H]-0.46
Distance (pc)10.6194 pc
Distance (ly)34.6 light-years
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