CONFIRMED EXOPLANET · Super-Earth

K2-21 b

Orbits Host Star: K2-21 (Type M0.0) · Distance: 272.800 Light-Years (83.645 pc)

Planetary Radius

1.840 R⊕

Planetary Mass

4.040 M⊕

Surface Gravity

1.19 g / g⊕

Equilibrium Temp

500K (+227°C / +441°F)

Orbital Period

9.325 days

Discovery Year

2015 (Transit)

Habitability Assessment

⚠️ Thermal Exclusions: High equilibrium temperature (500 K · +227°C / +441°F) places this world well interior to the runaway greenhouse threshold.

Discovery Facility: K2.

Other Worlds in the K2-21 System (1)

K2-21 c

Sub-Neptune · 15.5d

NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS

Inspect Raw NASA Archive Record ↗