Temperature
5731 K
5182.7 to 5758
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Stellar HostProfile
K2-38
G2 V • 192.7 pc
Records
9
literature rows
Planets
2
system count
References
10
distinct source labels
TIC: TIC 12666215
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: Toledo-Padrón et al. 2020 • System source: TICv8
Mass
1.03 Msun
1.01 to 2.24
Radius
1.06 Rsun
0.92 to 1.38
Age
6.70 Gyr
6.10 to 6.70
Luminosity
0.04 log(Lsun)
4.60e-4 to 0.10
Distance
192.7 pc
single adopted value
Spectral Type
G2 V
Consistent across records
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.06 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-38
1.06 R☉
System Layout
Known planets
2 planets linked to this host
K2-38: A Sun-Like Star with Two Super-Earths
K2-38 is a star located 628 light-years away, and it hosts two known planets. The star is a G2 V main-sequence dwarf, a Sun-like type, with an age of 6.7 billion years. Its mass is 1.03 solar masses, and its reported mass estimate is larger than the Sun's. Its radius is 1.06 solar radii, and its temperature is 5730 K.
The two planets are both classified as Super-Earths, meaning their radii fall between 1.5 and 2.5 times Earth's radius. Both were discovered by the transit method in 2016, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness.
K2-38 b has a mass of 7.3 Earth masses, a radius of 1.54 Earth radii, and an orbital period of 4.02 days. Its reported radius estimate is larger than Earth's, and its reported mass estimate is larger than Earth's. Its mean density is 11 g/cm³, 2 times Earth's. Among the listed planets, K2-38 b has the shortest year by reported estimates (4.02 days), the smallest radius by reported estimates (1.54 Earth radii), and the smallest reported mass (7.3 Earth masses).
K2-38 c has a mass of 8.3 Earth masses, a radius of 2.29 Earth radii, and an orbital period of 10.6 days. Its reported radius estimate is larger than Earth's, and its reported mass estimate is larger than Earth's. Its mean density is 3.81 g/cm³, 0.691 times Earth's. Among the listed planets, K2-38 c has the longest year by reported estimates (10.6 days), the largest radius by reported estimates (2.29 Earth radii), and the largest reported mass (8.3 Earth masses).
The two planets differ notably in density: K2-38 b's mean density is 11 g/cm³, while K2-38 c's is 3.81 g/cm³.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5679 | 1.04 | 0.92 | — | — | — | 192.7 | Howard et al. 2025 | TICv8 |
| 5758 | 1.08 | 1.12 | — | — | — | 192.7 | Crossfield et al. 2016 | TICv8 |
| 5705 | 1.05 | 1.14 | 6.10 | — | — | 192.7 | Bonomo et al. 2023 | TICv8 |
| — | — | 1.24 | — | — | — | 192.7 | Kruse et al. 2019 | TICv8 |
| 5757 | 2.24 | 1.38 | — | — | — | 192.7 | Stassun et al. 2017 | TICv8 |
| 5757 | 1.07 | 1.10 | — | — | G2 V | 192.7 | Sinukoff et al. 2016 | TICv8 |
| 5182.7 | — | 1.24 | — | 4.60e-4 | — | 192.7 | Gaia DR2 | TICv8 |
| 5731 | 1.03 | 1.06 | 6.70 | 0.04 | G2 V | 192.7 | Toledo-Padrón et al. 2020 | TICv8 |
| 5679 | 1.01 | 1.16 | — | 0.10 | — | 192.7 | TICv8 | TICv8 |