Temperature
5185 K
5161.2 to 5315
←Back to Stellar Hosts
Stellar HostProfile
K2-229
Unclassified star • 102.6 pc
Records
9
literature rows
Planets
2
system count
References
10
distinct source labels
TIC: TIC 98720809
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: Santerne et al. 2018 • System source: TICv8
Mass
0.84 Msun
0.80 to 0.89
Radius
0.79 Rsun
0.77 to 0.80
Age
5.40 Gyr
single adopted value
Distance
102.6 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.79 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-229
0.79 R☉
System Layout
Known planets
2 planets linked to this host
K2-229: A Sun-Like Star with Two Small Worlds
K2-229 is a G9 star located 335 light-years away. Its reported mass is 0.837 solar masses, its radius is 0.793 solar radii, and its temperature is 5190 K, all smaller or cooler than the Sun's corresponding values. The star is estimated to be 5.4 billion years old. Two planets are known to orbit it.
K2-229 b and K2-229 c were both 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. K2-229 b is an Earth-like planet with a radius of 1 Earth radii and an orbital period of 0.584 days. Among the listed planets, it has the shortest year and the smallest radius by reported estimates.
K2-229 c is a Super-Earth with a radius of 2.03 Earth radii, larger than Earth's, and an orbital period of 8.33 days. Among the listed planets, it has the longest year and the largest radius by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5161.2 | — | 0.80 | — | -0.39 | — | 102.6 | Gaia DR2 | TICv8 |
| 5315 | — | 0.79 | — | — | — | 102.6 | Adams et al. 2021 | TICv8 |
| 5185 | 0.80 | 0.78 | — | — | — | 102.6 | Dai et al. 2019 | TICv8 |
| 5315 | 0.87 | 0.79 | — | — | — | 102.6 | Livingston et al. 2018 | TICv8 |
| — | — | — | — | — | G9 | 102.6 | Luo et al. 2018 | TICv8 |
| 5185 | 0.84 | 0.79 | 5.40 | — | — | 102.6 | Santerne et al. 2018 | TICv8 |
| 5163 | 0.84 | 0.77 | — | — | — | 102.6 | Howard et al. 2025 | TICv8 |
| 5231 | 0.86 | 0.80 | — | — | — | 102.6 | Mayo et al. 2018 | TICv8 |
| 5214.5 | 0.89 | 0.79 | — | -0.38 | — | 102.6 | TICv8 | TICv8 |