Exoplanet
K2-139 b
Orbiting K2-139
Overview
K2-139 b is an exoplanet orbiting the star K2-139, discovered in 2017 using the Transit method. It is a Neptune-sized world.
Key Measurements
Radius
9.11
Earth radii
015 R⊕
Mass (est.)
65.04
Earth masses
0500 M⊕
Orbital Period
28.4
days
0.1d10,000d
Distance
153.9
parsecs
Nearby10,000 pc
Equilibrium Temp
524
K
150 K3,500 K
Radius (Earth radii)
9.11
Mass (Earth masses)
65.04
Estimated
Equilibrium Temperature
524 K
Orbital Period
28.38 days
Distance from Earth
153.9 pc (~502 ly)
Spectral Type
Unknown
Temperature
5370 K
Mass (Solar)
0.96 M☉
Radius (Solar)
0.88 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
289.0667°, -17.9107°
Discovery Method
Transit
Discovery Year
2017
Data Sources
Source ID: K2-139 b