Temperature
3990 K
3798 to 4066.7
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Stellar HostProfile
K2-54
Unclassified star • 175.0 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 12822545
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
0.61 Msun
0.42 to 0.62
Radius
0.64 Rsun
0.38 to 0.64
Luminosity
-1.02 log(Lsun)
-1.03 to -1.01
Distance
175.0 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.64 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-54
0.64 R☉
System Layout
Known planets
1 planets linked to this host
K2-54 b
Transit
◌
Discovery
2016
Period
9.78 days
Radius
2.61 R⊕
Mass
—
Eq. Temp
560 K
K2-54 b: A Neptune-Like World Orbiting a Cool Dwarf Star
K2-54 is a star located 571 light-years away, and it hosts one known planet. The star has a reported mass estimate of 0.615 solar masses, a radius estimate of 0.643 solar radii, and a temperature of 3990 K. All three of these values are smaller or cooler than the Sun's corresponding values.
The sole planet in this system is K2-54 b, a Neptune-like world discovered by the transit method in 2016. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. K2-54 b completes an orbit every 9.78 days. Its radius estimate is 2.61 Earth radii, which is larger than Earth's. In size classification, a Neptune-like planet reaches up to four times Earth's radius, and K2-54 b falls within that range.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
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 |
|---|---|---|---|---|---|---|---|---|
| 4066.7 | — | 0.63 | — | -1.01 | — | 175.0 | Gaia DR2 | TICv8 |
| 3798 | 0.42 | 0.38 | — | — | — | 175.0 | Crossfield et al. 2016 | TICv8 |
| 3990 | 0.61 | 0.64 | — | -1.02 | — | 175.0 | Thygesen et al. 2023 | TICv8 |
| 3996 | 0.62 | 0.64 | — | -1.03 | — | 175.0 | TICv8 | TICv8 |