Temperature
4174 K
4174 to 4239
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Stellar HostProfile
TOI-2018
K V • 28.00 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
HIP: HIP 74981TIC: TIC 357501308
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: Dai et al. 2023 • System source: TICv8
Mass
0.57 Msun
0.55 to 0.66
Radius
0.62 Rsun
0.58 to 0.62
Luminosity
-1 log(Lsun)
-1 to -0.96
Distance
28.00 pc
single adopted value
Spectral Type
K V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.62 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
TOI-2018
0.62 R☉
System Layout
Known planets
1 planets linked to this host
TOI-2018 b
Transit
◌
Discovery
2023
Period
7.44 days
Radius
2.27 R⊕
Mass
9.20 M⊕
Eq. Temp
—
TOI-2018 b: A Super-Earth Around a Cool Dwarf
TOI-2018 is a K V star, a main-sequence dwarf cooler and redder than the Sun, located 91.3 light-years away. Its mass is 0.57 solar masses and its radius is 0.62 solar radii, both smaller than the Sun's corresponding values, and its temperature of 4170 K is cooler than the Sun's. One planet orbits this star: TOI-2018 b.
TOI-2018 b is a Super-Earth, a size class that reaches up to 2.5 times Earth's radius. Its radius is 2.27 Earth radii, larger than Earth's, and its mass is 9.2 Earth masses, also larger than Earth's. The planet was discovered by the transit method in 2023, in which a planet passing in front of its star from our viewpoint causes a small dip in observed brightness. Its orbital period is 7.44 days, the time it takes to complete one orbit. Its mean density is 4.35 g/cm³, 0.789 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 4239 | 0.55 | 0.58 | — | -1 | K7 | 28.00 | Turnbull 2015 | TICv8 |
| 4218.9 | 0.66 | 0.62 | — | -0.96 | — | 28.00 | TICv8 | TICv8 |
| 4218.9 | — | 0.62 | — | — | — | 28.00 | ExoFOP | TICv8 |
| 4174 | 0.57 | 0.62 | — | -1 | K V | 28.00 | Dai et al. 2023 | TICv8 |