Temperature
4927 K
4842.2 to 4927
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Stellar HostProfile
K2-405
K0 • 197.2 pc
Records
5
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 149496868
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: Zink et al. 2021 • System source: TICv8
Mass
1.03 Msun
0.79 to 1.03
Radius
0.77 Rsun
0.77 to 0.80
Distance
197.2 pc
single adopted value
Spectral Type
K0
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.77 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-405
0.77 R☉
System Layout
Known planets
1 planets linked to this host
K2-405 b
Transit
◌
Discovery
2022
Period
3.44 days
Radius
4.57 R⊕
Mass
—
Eq. Temp
—
K2-405 b: A Jupiter-Like World Orbiting a Cool Dwarf
K2-405 is a K0 star located 643 light-years away. Its spectral type places it in the cooler, redder K class, with a reported temperature of 4930 K, which is cooler than the Sun's. The star's reported radius estimate is 0.765 solar radii, smaller than the Sun's, and it has a reported mass of 1.03 solar masses. One planet orbits it.
That planet is K2-405 b, a Jupiter-like world discovered by the transit method in 2022. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness, and repeated dips help establish orbital periods. K2-405 b completes one orbit in 3.44 days. Its reported radius estimate is 4.57 Earth radii, larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
Metallicitystable
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4927 | 1.03 | 0.77 | — | — | K0 | 197.2 | Zink et al. 2021 | TICv8 |
| 4927 | 1.03 | 0.77 | — | — | — | 197.2 | Christiansen et al. 2022 | TICv8 |
| 4870 | 0.79 | 0.80 | — | -0.49 | — | 197.2 | TICv8 | TICv8 |
| 4870 | — | 0.80 | — | — | — | 197.2 | ExoFOP | TICv8 |
| 4842.2 | — | 0.80 | — | — | — | 197.2 | Lafarga et al. 2026 | TICv8 |