Temperature
3830 K
3830 to 3892
โBack to Stellar Hosts
Stellar HostProfile
K2-22
M0 V โข 243.8 pc
Records
9
literature rows
Planets
1
system count
References
10
distinct source labels
TIC: TIC 363445338
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: Sanchis-Ojeda et al. 2015 โข System source: TICv8
Mass
0.60 Msun
0.42 to 0.60
Radius
0.57 Rsun
0.38 to 0.64
Distance
243.8 pc
single adopted value
Spectral Type
M0 V
Consistent across records
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.57 Rโ (circles scaled linearly by radius)
Sun
1.0 Rโ baseline
K2-22
0.57 Rโ
System Layout
Known planets
1 planets linked to this host
K2-22 b
Transit
โ
Discovery
2015
Period
0.38 days
Radius
2.30 Rโ
Mass
โ
Eq. Temp
โ
K2-22 and Its Close-Orbiting Planet
K2-22 is a star located 795 light-years from Earth. The host star has a spectral type of M0 V and is accompanied in the catalog by one additional stellar companion, making the system a two-star one. It has a mass of 0.6 solar masses and a radius of 0.57 solar radii, both smaller than the Sun's corresponding values, and a temperature of 3830 K, cooler than the Sun's. One planet orbits this host: K2-22 b.
K2-22 b was discovered in 2015 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness; repeated dips help establish orbital periods. The planet completes an orbit in just 0.381 days, and its radius of 2.3 Earth radii is larger than Earth's. That radius places it within the Super-Earth size class, which extends to 2.5 times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
9
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3892 | โ | 0.57 | โ | โ | โ | 243.8 | Vanderburg et al. 2016 | TICv8 |
| 3879.2 | 0.60 | 0.58 | โ | โ | โ | 243.8 | Dressing et al. 2017 | TICv8 |
| 3879 | โ | 0.58 | โ | โ | โ | 243.8 | Adams et al. 2021 | TICv8 |
| 3865 | 0.42 | 0.38 | โ | โ | โ | 243.8 | Crossfield et al. 2016 | TICv8 |
| โ | โ | 0.64 | โ | โ | โ | 243.8 | Kruse et al. 2019 | TICv8 |
| 3882 | 0.60 | 0.61 | โ | -1.11 | โ | 243.8 | TICv8 | TICv8 |
| 3830 | 0.60 | 0.57 | โ | โ | M0 V | 243.8 | Sanchis-Ojeda et al. 2015 | TICv8 |
| 3830 | โ | 0.54 | โ | โ | โ | 243.8 | Adams et al. 2016 | TICv8 |
| 3886.5 | โ | 0.64 | โ | -1.07 | โ | 243.8 | Gaia DR2 | TICv8 |