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L 98-59 b is a Rocky exoplanet (a small, dense world with a solid surface), smaller than Earth at 0.84 Earth radii. It has an equilibrium temperature of 620 K (347°C). The planet completes one orbit around its star every 2.3 Earth days. It was discovered in 2019 using the transit method. It orbits the M-type star L 98-59, located approximately 11 parsecs (35 light-years) from Earth.
2019
Discovered
0.5
Earth Masses
0.84
Earth Radii
620
Temperature (K)
Discovery Information
Discovery MethodTransit
Discovery Year2,019
Discovery FacilityTransiting Exoplanet Survey Satellite (TESS)
Orbital Properties
Orbital Period2.2531 days
Semi-Major Axis0.0223 AU
Eccentricity0.031
Inclination88.08 deg
Physical Properties
Mass (Jupiter)0.0014 MJ
Mass (Earth)0.46 M⊕
Radius (Jupiter)0.0747 RJ
Radius (Earth)0.837 R⊕
Density4.3 g/cm3
Eq. Temperature620 K
Insolation Flux24.5 S⊕
Planetary Extremes
Where L 98-59 b sits on the spectrum of all known exoplanets.
Mass0.5 M⊕
FeatherweightColossus
Radius0.84 R⊕
TinyEnormous
Temperature620 K
FrozenInferno
Year Length2.3 days
LightningGlacial
Density4.30 g/cm³
FluffyIron-dense
Star Distance0.022 AU
ScorchedFrozen exile
Star System View
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Size Comparison
0.84x Earth's radius
Orbit Comparison
Earth: 365.25 days (1 AU)L 98-59 b: 2.3 Earth days (0.022 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
What If You Lived Here?
46.0 kg
Your weight (from 70 kg)
0.66g
Light
Noticeably easier to move. You could jump much higher.
2.3 Earth days
Year length
Red sunrise
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