Temperature
3290 K
2997 to 3940.2
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Stellar HostProfile
K2-28
M4 • 63.00 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
TIC: TIC 39926974
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: Chen et al. 2018 • System source: TICv8
Mass
0.20 Msun
0.20 to 0.32
Radius
0.28 Rsun
0.18 to 0.34
Distance
63.00 pc
single adopted value
Spectral Type
M4
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.28 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-28
0.28 R☉
System Layout
Known planets
1 planets linked to this host
K2-28 b
Transit
◌
Discovery
2016
Period
2.26 days
Radius
2.32 R⊕
Mass
—
Eq. Temp
568 K
K2-28 and Its Super-Earth
K2-28 is a star 205 light-years away with one known planet. Its spectral type is M4, making it a small, cool red dwarf. The star's reported mass estimate is 0.201 solar masses and its reported radius estimate is 0.28 solar radii, both smaller than the Sun's. Its reported temperature is 3290 K, cooler than the Sun's.
The planet K2-28 b is classified as a Super-Earth, a size class that reaches 2.5 times Earth's radius. Its reported radius estimate is 2.32 Earth radii, larger than Earth's. It was discovered by transit in 2016, and its orbital period is 2.26 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 2997 | — | 0.18 | — | — | — | 63.00 | Vanderburg et al. 2016 | TICv8 |
| 3940.2 | — | — | — | — | — | 63.00 | Gaia DR2 | TICv8 |
| 3292.8 | 0.20 | 0.28 | — | — | — | 63.00 | Dressing et al. 2017 | TICv8 |
| 3290 | 0.20 | 0.28 | — | — | M4 | 63.00 | Chen et al. 2018 | TICv8 |
| 3214 | 0.26 | 0.29 | — | — | M4 | 63.00 | Hirano et al. 2016 | TICv8 |
| 3214 | 0.26 | 0.29 | — | — | — | 63.00 | Stefansson et al. 2018 | TICv8 |
| 3236 | — | 0.34 | — | — | — | 63.00 | ExoFOP | TICv8 |
| 3236 | 0.32 | 0.34 | — | -1.94 | — | 63.00 | TICv8 | TICv8 |
| — | — | 0.18 | — | — | — | 63.00 | Kruse et al. 2019 | TICv8 |