Temperature
5748 K
5748 to 5886
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Stellar HostProfile
K2-170
Unclassified star • 392.9 pc
Records
5
literature rows
Planets
2
system count
References
6
distinct source labels
TIC: TIC 188509935
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: Mayo et al. 2018 • System source: TICv8
Mass
0.96 Msun
0.96 to 1.07
Radius
0.98 Rsun
0.98 to 1.08
Distance
392.9 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.98 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-170
0.98 R☉
System Layout
Known planets
2 planets linked to this host
K2-170 and Its Two Known Planets
K2-170 is a star 1280 light-years away with two planets in its system. The star has a mass of 0.964 solar masses, which is smaller than the Sun's mass. Its radius is 0.982 solar radii, and its temperature is 5750 K.
Both planets were discovered by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Repeated dips help establish orbital periods. K2-170 b orbits every 7.58 days and has a radius of 1.42 Earth radii, which is larger than Earth's, and its Earth-like class compares its radius with Earth's. K2-170 c orbits every 12.4 days and has a radius of 1.8 Earth radii, also larger than Earth's, and it is classified as a Super-Earth.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5775 | — | 1.08 | — | 0.07 | — | 392.9 | Gaia DR2 | TICv8 |
| 5748 | 0.96 | 0.98 | — | — | — | 392.9 | Mayo et al. 2018 | TICv8 |
| 5886 | 1.07 | 1.06 | — | 0.08 | — | 392.9 | TICv8 | TICv8 |
| — | — | 1.08 | — | — | — | 392.9 | Kruse et al. 2019 | TICv8 |
| 5749 | — | 0.98 | — | — | — | 392.9 | Vanderburg et al. 2016 | TICv8 |