Temperature
3750 K
3650 to 4003.5
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Stellar HostProfile
K2-321
Unclassified star • 77.69 pc
Records
5
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 277833995
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: Thygesen et al. 2023 • System source: TICv8
Mass
0.58 Msun
0.58 to 0.60
Radius
0.59 Rsun
0.58 to 0.59
Luminosity
-1.20 log(Lsun)
-1.25 to -1.20
Distance
77.69 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.59 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-321
0.59 R☉
System Layout
Known planets
1 planets linked to this host
K2-321 b
Transit
◌
Discovery
2020
Period
2.30 days
Radius
2.05 R⊕
Mass
—
Eq. Temp
830 K
K2-321: A Cool Dwarf with a Super-Earth
K2-321 is a star located 253 light-years away. It has a mass of 0.578 solar masses and a radius of 0.595 solar radii, making both its mass and radius smaller than the Sun's. Its temperature is 3750 K, cooler than the Sun. This host star is known to have one planet.
That planet is K2-321 b, a Super-Earth discovered in 2020 by the transit method, in which a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. It orbits every 2.3 days and has a radius of 2.05 Earth radii, larger than Earth's. A Super-Earth reaches up to 2.5 times Earth's radius, and this planet's size classification is based on its radius rather than its composition.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3750 | 0.58 | 0.59 | — | -1.20 | — | 77.69 | Thygesen et al. 2023 | TICv8 |
| 3650 | 0.58 | 0.59 | — | -1.25 | — | 77.69 | TICv8 | TICv8 |
| 3650 | — | 0.59 | — | — | — | 77.69 | ExoFOP | TICv8 |
| 4003.5 | — | — | — | — | — | 77.69 | Gaia DR2 | TICv8 |
| 3855 | 0.60 | 0.58 | — | — | — | 77.69 | Castro González et al. 2020 | TICv8 |