Temperature
4473 K
4473 to 4710
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Stellar HostProfile
K2-381
Unclassified star • 145.7 pc
Records
8
literature rows
Planets
3
system count
References
7
distinct source labels
TIC: TIC 10195089
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: Christiansen et al. 2022 • System source: TICv8
Mass
0.75 Msun
0.72 to 0.75
Radius
0.68 Rsun
0.62 to 0.70
Distance
145.7 pc
single adopted value
Planets
3
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.68 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-381
0.68 R☉
System Layout
Known planets
3 planets linked to this host
K2-381: A Cool Star with Three Transiting Planets
K2-381 is a star located 475 light-years away, and it hosts three known planets. The host star has a mass of 0.754 solar masses and a radius of 0.675 solar radii, making its reported radius estimate smaller than the Sun's. Its temperature is 4470 K, which is cooler than the Sun's.
K2-381 b is an Earth-like world discovered by transit in 2022. It completes an orbit in 7.94 days and has a radius of 1.08 Earth radii. Among the listed planets, K2-381 b has the shortest year and the smallest radius by reported estimates.
K2-381 c is a Super-Earth discovered by transit in 2022. It orbits its star every 16 days and has a radius of 2 Earth radii, larger than Earth's. Among the listed planets, it has the second-shortest year and the largest radius by reported estimates.
K2-381 d is also a Super-Earth, discovered by transit in 2022. Its orbital period is 26.8 days, and its radius is 1.69 Earth radii, larger than Earth's. Among the listed planets, K2-381 d has the longest year and the second-smallest radius by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4575 | 0.72 | 0.68 | — | -0.74 | — | 145.7 | TICv8 | TICv8 |
| 4710 | — | 0.62 | — | — | — | 145.7 | Zink et al. 2019 | TICv8 |
| 4661 | — | 0.65 | — | — | — | 145.7 | Mayo et al. 2018 | TICv8 |
| — | — | 0.70 | — | — | — | 145.7 | Petigura et al. 2018 | TICv8 |
| — | — | 0.62 | — | — | — | 145.7 | Kruse et al. 2019 | TICv8 |
| — | — | 0.62 | — | — | — | 145.7 | Kruse et al. 2019 | TICv8 |
| 4661 | — | 0.65 | — | — | — | 145.7 | Mayo et al. 2018 | TICv8 |
| 4473 | 0.75 | 0.68 | — | — | — | 145.7 | Christiansen et al. 2022 | TICv8 |