Temperature
4413 K
4388 to 4622.2
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Stellar HostProfile
K2-57
Unclassified star • 264.2 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
TIC: TIC 146799150
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
0.70 Msun
0.68 to 0.70
Radius
0.67 Rsun
0.60 to 0.69
Age
6.80 Gyr
single adopted value
Luminosity
-0.81 log(Lsun)
-0.83 to -0.78
Distance
264.2 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.67 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-57
0.67 R☉
System Layout
Known planets
1 planets linked to this host
K2-57 b
Transit
◌
Discovery
2016
Period
9.01 days
Radius
2.31 R⊕
Mass
—
Eq. Temp
635.8 K
K2-57 b: A Super-Earth
K2-57 is a star located 862 light-years away, and it hosts one planet. The star is estimated to be 6.8 billion years old, with a mass of 0.699 solar masses and a radius of 0.671 solar radii. Its temperature is 4410 K, making it cooler than the Sun. Both its mass and radius estimates are smaller than the Sun's.
The planet, K2-57 b, is classified as a Super-Earth. It was discovered in 2016 by the transit method, in which a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. K2-57 b completes an orbit every 9.01 days. Its radius is 2.31 Earth radii, larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4443 | 0.70 | 0.69 | — | -0.78 | — | 264.2 | TICv8 | TICv8 |
| 4622.2 | — | 0.60 | — | -0.83 | — | 264.2 | Gaia DR2 | TICv8 |
| — | — | 0.60 | — | — | — | 264.2 | Kruse et al. 2019 | TICv8 |
| 4388 | — | 0.68 | — | — | — | 264.2 | Vanderburg et al. 2016 | TICv8 |
| 4413 | 0.70 | 0.67 | 6.80 | -0.81 | — | 264.2 | Thygesen et al. 2023 | TICv8 |
| 4434 | 0.68 | 0.62 | — | — | — | 264.2 | Crossfield et al. 2016 | TICv8 |