Temperature
3930 K
3930 to 4241
โBack to Stellar Hosts
Stellar HostProfile
K2-5
K7.5 V โข 202.9 pc
Records
8
literature rows
Planets
2
system count
References
8
distinct source labels
TIC: TIC 38064757
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: Sinukoff et al. 2016 โข System source: TICv8
Mass
0.61 Msun
0.52 to 0.65
Radius
0.57 Rsun
0.46 to 0.62
Distance
202.9 pc
single adopted value
Spectral Type
K7.5 V
Consistent across records
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.57 Rโ (circles scaled linearly by radius)
Sun
1.0 Rโ baseline
K2-5
0.57 Rโ
System Layout
Known planets
2 planets linked to this host
K2-5: A Cool Dwarf with Two Super-Earths
K2-5 is a K7.5 V star located 662 light-years away. It has a reported mass of 0.61 solar masses, a radius of 0.57 solar radii, and a temperature of 3930 K. These make it smaller and cooler than the Sun. Two planets have been reported orbiting it.
K2-5 b and K2-5 c are both Super-Earths, discovered by transit in 2015. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. K2-5 b completes an orbit in 5.74 days and has a radius of 1.91 Earth radii, while K2-5 c takes 10.9 days and has a radius of 2.26 Earth radii. This makes K2-5 b the smaller and faster-orbiting of the two, and K2-5 c the larger and slower one; among the listed planets, K2-5 b has the shortest year and the smallest radius, and K2-5 c has the longest year and the largest radius. Both planets are larger than Earth.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
7
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 |
|---|---|---|---|---|---|---|---|---|
| 4021 | 0.52 | 0.46 | โ | โ | โ | 202.9 | Crossfield et al. 2016 | TICv8 |
| 4102 | 0.53 | 0.52 | โ | โ | โ | 202.9 | Montet et al. 2015 | TICv8 |
| 4241 | โ | 0.53 | โ | -1.08 | โ | 202.9 | Gaia DR2 | TICv8 |
| 4125 | 0.65 | 0.59 | โ | -1.04 | โ | 202.9 | TICv8 | TICv8 |
| 3930 | 0.61 | 0.57 | โ | โ | K7.5 V | 202.9 | Sinukoff et al. 2016 | TICv8 |
| โ | โ | 0.53 | โ | โ | โ | 202.9 | Kruse et al. 2019 | TICv8 |
| โ | โ | 0.53 | โ | โ | โ | 202.9 | Kruse et al. 2019 | TICv8 |
| 4088 | โ | 0.62 | โ | โ | โ | 202.9 | Vanderburg et al. 2016 | TICv8 |