Temperature
5573.4 K
4856.0 to 5580
←Back to Stellar Hosts
Stellar HostProfile
K2-173
Unclassified star • 228.6 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 242993844
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: TICv8 • System source: TICv8
Mass
0.98 Msun
0.88 to 0.98
Radius
1.00 Rsun
0.84 to 1.10
Luminosity
-0.06 log(Lsun)
-0.22 to -0.06
Distance
228.6 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.00 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-173
1.00 R☉
System Layout
Known planets
1 planets linked to this host
K2-173 b
Transit
◌
Discovery
2018
Period
5.87 days
Radius
1.61 R⊕
Mass
—
Eq. Temp
—
K2-173 b: A Super-Earth
K2-173 is a star 746 light-years from Earth. The star has a mass of 0.983 solar masses, a radius of 1 solar radii, and a temperature of 5570 K, making it cooler than the Sun. One planet orbits K2-173.
That planet, K2-173 b, is a Super-Earth discovered by the transit method in 2018. During a transit, a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. K2-173 b completes one orbit every 5.87 days and has a radius of 1.61 Earth radii, larger than Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | — | 228.6 | Barros et al. 2016 | TICv8 |
| 5573.4 | 0.98 | 1.00 | — | -0.06 | — | 228.6 | TICv8 | TICv8 |
| 4856.0 | — | 1.10 | — | -0.22 | — | 228.6 | Gaia DR2 | TICv8 |
| 5580 | 0.88 | 0.84 | — | — | — | 228.6 | Mayo et al. 2018 | TICv8 |