Temperature
4667 K
4093 to 4667
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Stellar HostProfile
K2-247
Unclassified star • 258.1 pc
Records
3
literature rows
Planets
2
system count
References
4
distinct source labels
TIC: TIC 110999033
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: Livingston et al. 2018 • System source: TICv8
Mass
0.74 Msun
0.64 to 0.74
Radius
0.69 Rsun
0.67 to 0.76
Distance
258.1 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.69 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-247
0.69 R☉
System Layout
Known planets
2 planets linked to this host
K2-247: A Cool Star With Two Super-Earths
K2-247 is a star 842 light-years away with two known planets. The star has a mass of 0.74 solar masses, a radius of 0.69 solar radii, and a temperature of 4670 K; its mass, radius, and temperature are all lower than the Sun's.
Both planets are Super-Earths discovered by transit, the method that detects the slight dimming caused when a planet crosses in front of its star. K2-247 b has a radius of 2.12 Earth radii, larger than Earth's, and orbits every 2.25 days. K2-247 c has a radius of 2.19 Earth radii, also larger than Earth's, and orbits every 6.49 days. Among these two planets, K2-247 b has the shortest year and the smallest radius, while K2-247 c has the longest year and the largest radius. Each Super-Earth classification means its radius is up to 2.5 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
3
Stellar refs
3
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitystable