Temperature
4522.7 K
4522.7 to 4927.6
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Stellar HostProfile
K2-228
Unclassified star • 129.5 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 98751904
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
0.71 Msun
0.71 to 0.74
Radius
0.61 Rsun
0.61 to 0.70
Luminosity
-0.85 log(Lsun)
single adopted value
Distance
129.5 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.61 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-228
0.61 R☉
System Layout
Known planets
1 planets linked to this host
K2-228 b
Transit
◌
Discovery
2018
Period
2.70 days
Radius
1.21 R⊕
Mass
—
Eq. Temp
914 K
K2-228 b: An Earth-Like World Around a Cool Star
K2-228 is a star located 422 light-years away. It has a mass of 0.711 solar masses, a radius of 0.613 solar radii, and a temperature of 4520 K. Its mass, radius, and temperature are all smaller or cooler than the Sun's. One planet orbits this star.
That planet, K2-228 b, is classified as Earth-like and 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. K2-228 b has a radius of 1.21 Earth radii, larger than Earth's, and an orbital period of 2.7 days. Earth-like means its radius stays within 1.5 times Earth's radius, a size classification rather than a statement about composition.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4764 | 0.74 | 0.70 | — | — | — | 129.5 | Mayo et al. 2018 | TICv8 |
| 4522.7 | 0.71 | 0.61 | — | -0.85 | — | 129.5 | TICv8 | TICv8 |
| 4927.6 | — | — | — | — | — | 129.5 | Gaia DR2 | TICv8 |
| 4715 | 0.71 | 0.65 | — | — | — | 129.5 | Livingston et al. 2018 | TICv8 |