Temperature
5525 K
5060.6 to 5888
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Stellar HostProfile
K2-178
Unclassified star • 214.8 pc
Records
6
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 26078330
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: Mayo et al. 2018 • System source: TICv8
Mass
0.95 Msun
0.95 to 1.07
Radius
0.89 Rsun
0.89 to 0.94
Distance
214.8 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.89 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-178
0.89 R☉
System Layout
Known planets
1 planets linked to this host
K2-178 b
Transit
◌
Discovery
2018
Period
8.75 days
Radius
3.56 R⊕
Mass
—
Eq. Temp
—
K2-178 b: A Neptune-Like World in a Distant System
K2-178 is a star located 700 light-years from Earth. Its mass is 0.951 solar masses and its radius is 0.887 solar radii, making both estimates smaller than the Sun's corresponding values. The star's temperature is 5530 K, cooler than the Sun's. One planet is known to orbit this host.
That planet, K2-178 b, is classified as Neptune-like and was discovered by the transit method in 2018. 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. K2-178 b completes one orbit in 8.75 days and has a radius of 3.56 Earth radii, an estimate larger than Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
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 |
|---|---|---|---|---|---|---|---|---|
| 5888 | — | 0.89 | — | — | — | 214.8 | ExoFOP | TICv8 |
| — | — | 0.94 | — | — | — | 214.8 | Kruse et al. 2019 | TICv8 |
| — | — | 0.94 | — | — | — | 214.8 | Kruse et al. 2019 | TICv8 |
| 5888 | 1.07 | 0.89 | — | -0.07 | — | 214.8 | TICv8 | TICv8 |
| 5525 | 0.95 | 0.89 | — | — | — | 214.8 | Mayo et al. 2018 | TICv8 |
| 5060.6 | — | 0.94 | — | -0.28 | — | 214.8 | Gaia DR2 | TICv8 |