Temperature
3459 K
3388 to 4172.9
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Stellar HostProfile
K2-242
Unclassified star • 109.2 pc
Records
3
literature rows
Planets
1
system count
References
4
distinct source labels
TIC: TIC 152701771
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
0.38 Msun
0.35 to 0.38
Radius
0.37 Rsun
0.36 to 0.37
Distance
109.2 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.37 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-242
0.37 R☉
System Layout
Known planets
1 planets linked to this host
K2-242 b
Transit
◌
Discovery
2018
Period
6.51 days
Radius
2.54 R⊕
Mass
—
Eq. Temp
416 K
K2-242 b: A Neptune-Like World Around a Cool Dwarf Star
K2-242 is a star located 356 light-years from Earth, and it hosts one known planet. The star's reported mass estimate is 0.38 solar masses and its reported radius estimate is 0.37 solar radii, both smaller than the Sun's. Its reported temperature is 3460 K, cooler than the Sun's.
The planet K2-242 b is Neptune-like, a size class that includes planets with radii up to four times Earth's. It was discovered in 2018 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness; repeated dips help establish orbital periods. K2-242 b's reported radius estimate is 2.54 Earth radii, larger than Earth's, and its orbital period is 6.51 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
3
Stellar refs
3
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitystable