Temperature
5667 K
5440.2 to 5675
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Stellar HostProfile
K2-197
Unclassified star • 247.6 pc
Records
7
literature rows
Planets
1
system count
References
8
distinct source labels
TIC: TIC 179032688
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: Livingston et al. 2018 • System source: TICv8
Mass
1 Msun
0.97 to 1
Radius
0.93 Rsun
0.91 to 0.98
Distance
247.6 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.93 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-197
0.93 R☉
System Layout
Known planets
1 planets linked to this host
K2-197 b
Transit
◌
Discovery
2018
Period
8.36 days
Radius
2.56 R⊕
Mass
—
Eq. Temp
848 K
K2-197 and Its Neptune-like Planet
K2-197 is a star 808 light-years away with a single known planet, K2-197 b. The host star has a mass of 1 solar masses, a radius of 0.93 solar radii, and a temperature of 5670 K. Its radius is smaller than the Sun's, and its temperature is cooler than the Sun's.
K2-197 b was discovered in 2018 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 the planet's orbital period. K2-197 b completes one orbit every 8.36 days.
K2-197 b is Neptune-like, a size class that reaches 4 times Earth's radius. Its radius is 2.56 Earth radii, larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | 0.96 | — | — | — | 247.6 | Petigura et al. 2018 | TICv8 |
| 5440.2 | — | 0.98 | — | -0.12 | — | 247.6 | Gaia DR2 | TICv8 |
| — | — | — | — | — | — | 247.6 | Barros et al. 2016 | TICv8 |
| 5627 | 1.00 | 0.92 | — | -0.11 | — | 247.6 | TICv8 | TICv8 |
| 5667 | 1 | 0.93 | — | — | — | 247.6 | Livingston et al. 2018 | TICv8 |
| 5675 | 0.97 | 0.91 | — | — | — | 247.6 | Mayo et al. 2018 | TICv8 |
| — | — | — | — | — | — | 247.6 | Pope et al. 2016 | TICv8 |