Temperature
5695 K
5330.3 to 5695
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Stellar HostProfile
K2-231
Unclassified star • 321.2 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 130538732
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: Curtis et al. 2018 • System source: TICv8
Mass
1.01 Msun
0.96 to 1.01
Radius
0.95 Rsun
0.95 to 1.04
Age
3 Gyr
single adopted value
Distance
321.2 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.95 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-231
0.95 R☉
System Layout
Known planets
1 planets linked to this host
K2-231 b
Transit
◌
Discovery
2018
Period
13.84 days
Radius
2.50 R⊕
Mass
—
Eq. Temp
—
K2-231 b: A Neptune-like Planet in a Distant System
K2-231 is a star located 1050 light-years away with one known planet. The host star is estimated to be 3 billion years old, with a mass of 1.01 solar masses and a radius of 0.95 solar radii. Its reported radius estimate is smaller than the Sun's, and its temperature of 5700 K is cooler than the Sun's.
The planet K2-231 b is classified as Neptune-like and was discovered in 2018 using the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. K2-231 b has an orbital period of 13.8 days and a radius of 2.5 Earth radii, which is larger than Earth's. Its size classification places it at the upper boundary of the Super-Earth range and within the Neptune-like range, based on radius rather than composition.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5478 | 0.96 | 1.04 | — | -0.06 | — | 321.2 | TICv8 | TICv8 |
| — | — | 1.03 | — | — | — | 321.2 | Kruse et al. 2019 | TICv8 |
| 5330.3 | — | 1.03 | — | -0.11 | — | 321.2 | Gaia DR2 | TICv8 |
| 5695 | 1.01 | 0.95 | 3 | — | — | 321.2 | Curtis et al. 2018 | TICv8 |