Temperature
3919 K
3893.5 to 4258
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Stellar HostProfile
K2-155
Unclassified star • 72.80 pc
Records
6
literature rows
Planets
3
system count
References
7
distinct source labels
TIC: TIC 17307715
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: Hirano et al. 2018 • System source: TICv8
Mass
0.54 Msun
0.54 to 0.65
Radius
0.53 Rsun
0.53 to 0.66
Luminosity
-1.23 log(Lsun)
-1.23 to -1.05
Distance
72.80 pc
single adopted value
Planets
3
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.53 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-155
0.53 R☉
System Layout
Known planets
3 planets linked to this host
K2-155 and Its Three Worlds
K2-155 is a K7 star located 237 light-years away. Its reported mass estimate is 0.54 solar masses - smaller than the Sun's - while its reported radius estimate is 0.526 solar radii, also smaller than the Sun's. The star's reported temperature of 3920 K is cooler than the Sun's. Three planets are known to orbit this host.
K2-155 b is a Super-Earth discovered by transit in 2018. It completes one orbit every 6.34 days and has a reported radius estimate of 1.8 Earth radii, larger than Earth's. Among the listed planets, it has the shortest year and the smallest radius by reported estimates. K2-155 c is a Neptune-like planet, also found by transit in 2018, with an orbital period of 13.9 days and a radius estimate of 2.6 Earth radii - larger than Earth's. It has the second-shortest year and the largest radius among the listed planets. K2-155 d is a Super-Earth, likewise discovered by transit in 2018, taking 40.7 days to orbit its star. Its radius estimate of 1.9 Earth radii is larger than Earth's, making it the second-smallest planet and the longest-period world among the listed planets.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4247.6 | — | — | — | — | — | 72.80 | Gaia DR2 | TICv8 |
| 3919 | 0.54 | 0.53 | — | -1.23 | — | 72.80 | Hirano et al. 2018 | TICv8 |
| 3893.5 | 0.60 | 0.66 | — | -1.05 | — | 72.80 | TICv8 | TICv8 |
| 3893.5 | — | 0.66 | — | — | — | 72.80 | ExoFOP | TICv8 |
| 4258 | 0.65 | 0.58 | — | — | — | 72.80 | Díez Alonso et al. 2018 | TICv8 |
| — | — | — | — | — | K7 | 72.80 | Luo et al. 2018 | TICv8 |