Temperature
3420 K
3420 to 3720.8
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Stellar HostProfile
K2-239
M3.0 V • 31.08 pc
Records
3
literature rows
Planets
3
system count
References
4
distinct source labels
TIC: TIC 374339566
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Díez Alonso et al. 2018 • System source: TICv8
Mass
0.40 Msun
0.23 to 0.40
Radius
0.36 Rsun
0.26 to 0.36
Luminosity
-1.80 log(Lsun)
-2.09 to -1.80
Distance
31.08 pc
single adopted value
Spectral Type
M3.0 V
Consistent across records
Planets
3
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.36 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-239
0.36 R☉
System Layout
Known planets
3 planets linked to this host
K2-239: A Nearby Red Dwarf with Three Small Worlds
K2-239 is an M3.0 V star, a small, cool red dwarf, located 101 light-years from Earth. It is known to host three planets. Its measured mass is 0.4 solar masses and its radius is 0.36 solar radii, both smaller than the Sun's, while its temperature of 3420 K is cooler than the Sun's.
All three planets were discovered by the transit method in 2018. K2-239 b has an orbital period of 5.24 days and a radius of 1.1 Earth radii, placing it in the Earth-like size class. K2-239 c orbits every 7.78 days and has a radius of 1 Earth radii, the smallest reported radius among the listed planets. K2-239 d takes 10.1 days to complete an orbit and has a radius of 1.1 Earth radii, also Earth-like in size. Among the listed planets, K2-239 b has the shortest year and K2-239 d the longest, both by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
3
Stellar refs
3
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
Spectral Typestable