Temperature
5945.8 K
5945.8 to 5946
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Stellar HostProfile
K2-398
Unclassified star • 607.0 pc
Records
3
literature rows
Planets
2
system count
References
4
distinct source labels
TIC: TIC 281660552
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: TICv8 • System source: TICv8
Mass
1.09 Msun
0.94 to 1.09
Radius
1.27 Rsun
1.24 to 1.27
Luminosity
0.26 log(Lsun)
single adopted value
Distance
607.0 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.27 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-398
1.27 R☉
System Layout
Known planets
2 planets linked to this host
K2-398: A Sun-Like Star With Two Transit-Detected Planets
K2-398 is a G2 star located 1980 light-years away. Its reported mass is 1.09 solar masses and its radius is 1.27 solar radii; its reported temperature is 5950 K. Two planets orbit this host.
Both planets were discovered by transit in 2022. K2-398 b is classified as a Super-Earth, with a radius of 2.27 Earth radii and an orbital period of 6.39 days. K2-398 c is Jupiter-like, with a radius of 5.1 Earth radii and an orbital period of 18.8 days.
Among the listed planets, K2-398 b has the shortest year and the smallest radius by reported estimates, while K2-398 c has the longest year and the largest radius. Both planets' reported radius estimates are larger than Earth's. The star's reported radius estimate is larger than the Sun's, and its reported temperature is hotter than the Sun's.
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 |
|---|---|---|---|---|---|---|---|---|
| 5946 | 0.94 | 1.24 | — | — | G2 | 607.0 | Zink et al. 2021 | TICv8 |
| 5946 | 0.94 | 1.24 | — | — | — | 607.0 | Christiansen et al. 2022 | TICv8 |
| 5945.8 | 1.09 | 1.27 | — | 0.26 | — | 607.0 | TICv8 | TICv8 |