Temperature
4213 K
4213 to 4328
←Back to Stellar Hosts
Stellar HostProfile
K2-401
K7 • 200.7 pc
Records
3
literature rows
Planets
1
system count
References
4
distinct source labels
TIC: TIC 345063080
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: Zink et al. 2021 • System source: TICv8
Mass
0.87 Msun
0.68 to 0.87
Radius
0.68 Rsun
0.68 to 0.68
Distance
200.7 pc
single adopted value
Spectral Type
K7
Consistent across records
Planets
1
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
K2-401
0.68 R☉
System Layout
Known planets
1 planets linked to this host
K2-401 b
Transit
◌
Discovery
2022
Period
6.29 days
Radius
2.26 R⊕
Mass
—
Eq. Temp
—
K2-401 b: A Super-Earth Orbiting a Cool Dwarf
K2-401 is a K7 star located 655 light-years away. Its spectral type places it among the cooler, redder stars, and it is classified as a dwarf. The star has a mass of 0.87 solar masses, a radius of 0.675 solar radii, and a temperature of 4210 K. Its reported radius estimate is smaller than the Sun's, and its reported temperature is cooler than the Sun's. One planet orbits this host.
That planet is K2-401 b, a Super-Earth discovered by the transit method in 2022. A transit occurs when a planet passes in front of its star from our viewpoint, producing a small dip in observed brightness; repeated dips help establish orbital periods. The planet's radius is 2.26 Earth radii, larger than Earth's. Its orbital period is 6.29 days, the time it takes to complete one orbit.
Provenance
Underlying measurements and references
Evidence Summary
Rows
3
Stellar refs
3
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitystable
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4328 | 0.68 | 0.68 | — | -0.84 | — | 200.7 | TICv8 | TICv8 |
| 4213 | 0.87 | 0.68 | — | — | — | 200.7 | Christiansen et al. 2022 | TICv8 |
| 4213 | 0.87 | 0.68 | — | — | K7 | 200.7 | Zink et al. 2021 | TICv8 |