K2-39 b
Orbiting K2-39
K2-39 b is an exoplanet orbiting the star K2-39, discovered in 2016 using the Transit method. It is a Neptune-sized world.
Radius
6.28
Earth radii
Mass
28.60
Earth masses
Orbital Period
4.6
days
Distance
307.5
parsecs
Radius (Earth radii)
6.28
Mass (Earth masses)
28.60
Measured
Equilibrium Temperature
Unknown
Parameter source: Stassun et al. 2017
Orbital Period
4.605+0.000−0.000days
Planet Mass (Earth masses)
28.60+15.89−15.89
Planet Mass (Jupiter masses)
0.0900+0.0500−0.0500
Eccentricity
0.0000
Radial Velocity Semi-Amplitude
14.40+2.60−2.60m/s
Distance from Earth
307.5 pc (~1003 ly)
Spectral Type
Unknown
Temperature
4881 K
Mass (Solar)
0.66 M☉
Radius (Solar)
2.97 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
338.3682°, -9.0229°
Discovery Method
Transit
Discovery Year
2016
Source ID: K2-39 b
K2-39 b orbits K2-39 and was reported in 2016 and was detected with the Transit method.
Published measurements list a radius of 6.28 Earth radii, a mass of 28.6 Earth masses, and an orbital period of 4.61 days.
Catalog data places the system at about 307.5 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open K2-39