Temperature
5026 K
4956.9 to 5028
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Stellar HostProfile
K2-203
Unclassified star • 166.1 pc
Records
6
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 333605244
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: Thygesen et al. 2023 • System source: TICv8
Mass
0.79 Msun
0.79 to 0.84
Radius
0.77 Rsun
0.76 to 0.78
Age
6.90 Gyr
single adopted value
Luminosity
-0.47 log(Lsun)
-0.48 to -0.47
Distance
166.1 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.77 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-203
0.77 R☉
System Layout
Known planets
1 planets linked to this host
K2-203 b
Transit
◌
Discovery
2018
Period
9.70 days
Radius
1.27 R⊕
Mass
—
Eq. Temp
738.4 K
K2-203 b: A Close-Orbiting Earth-Like Planet
K2-203 is a star located 542 light-years away. It is 6.9 billion years old and has a mass of 0.793 solar masses, a radius of 0.765 solar radii, and a temperature of 5030 K. Its reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's. One planet orbits this host.
That planet is K2-203 b, an Earth-like world discovered by transit in 2018. Its radius is 1.27 Earth radii, larger than Earth's, which places it within the Earth-like size class. It completes one orbit every 9.7 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | 0.78 | — | — | — | 166.1 | Kruse et al. 2019 | TICv8 |
| 5026 | 0.79 | 0.77 | 6.90 | -0.47 | — | 166.1 | Thygesen et al. 2023 | TICv8 |
| 5028 | 0.84 | 0.76 | — | -0.47 | — | 166.1 | TICv8 | TICv8 |
| 4956.9 | — | 0.78 | — | -0.48 | — | 166.1 | Gaia DR2 | TICv8 |
| 5000 | 0.79 | 0.76 | — | — | — | 166.1 | Mayo et al. 2018 | TICv8 |
| — | — | 0.78 | — | — | — | 166.1 | Kruse et al. 2019 | TICv8 |