Temperature
3676 K
3676 to 3844.3
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Stellar HostProfile
K2-117
M1.0 V • 101.6 pc
Records
12
literature rows
Planets
2
system count
References
11
distinct source labels
TIC: TIC 458686847
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: Hirano et al. 2018 • System source: TICv8
Mass
0.53 Msun
0.51 to 0.58
Radius
0.51 Rsun
0.40 to 0.52
Luminosity
-1.36 log(Lsun)
-1.36 to -1.35
Distance
101.6 pc
single adopted value
Spectral Type
M1.0 V
Consistent across records
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.51 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-117
0.51 R☉
System Layout
Known planets
2 planets linked to this host
K2-117 and Its Two Super-Earths
K2-117 is an M1.0 V star, a small, cool red dwarf, located 331 light-years away. Its reported mass estimate is 0.532 solar masses and its reported radius estimate is 0.513 solar radii, both smaller than the Sun's. The star's reported temperature is 3680 K, cooler than the Sun's. Two planets orbit this host.
Both are Super-Earths discovered by transit in 2017. K2-117 b has an orbital period of 1.29 days and a radius of 2.03 Earth radii, larger than Earth's. K2-117 c has an orbital period of 5.44 days and a radius of 2.06 Earth radii, also larger than Earth's. Among the listed planets, K2-117 b has the shortest year and the smallest radius by reported estimates, while K2-117 c has the longest year and the largest radius by reported estimates.
Provenance
Underlying measurements and references
Evidence Summary
Rows
12
Stellar refs
10
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3689 | 0.51 | 0.51 | — | -1.35 | — | 101.6 | TICv8 | TICv8 |
| 3676 | 0.53 | 0.51 | — | -1.36 | M1.0 V | 101.6 | Hirano et al. 2018 | TICv8 |
| — | — | — | — | — | — | 101.6 | Barros et al. 2016 | TICv8 |
| — | — | 0.40 | — | — | — | 101.6 | Kruse et al. 2019 | TICv8 |
| — | — | 0.52 | — | — | — | 101.6 | Petigura et al. 2018 | TICv8 |
| — | — | 0.52 | — | — | — | 101.6 | Petigura et al. 2018 | TICv8 |
| — | — | 0.40 | — | — | — | 101.6 | Kruse et al. 2019 | TICv8 |
| 3689 | — | 0.51 | — | — | — | 101.6 | ExoFOP | TICv8 |
| 3842.1 | 0.58 | 0.49 | — | — | — | 101.6 | Dressing et al. 2017 | TICv8 |
| — | — | — | — | — | — | 101.6 | Pope et al. 2016 | TICv8 |
| 3844.3 | — | — | — | — | — | 101.6 | Gaia DR2 | TICv8 |
| 3778 | 0.54 | 0.51 | — | — | — | 101.6 | Livingston et al. 2018 | TICv8 |