Temperature
5520 K
5416.2 to 5520
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Stellar HostProfile
K2-291
Unclassified star • 90.06 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HD: HD 285181TIC: TIC 27039476
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: Kosiarek et al. 2019 • System source: TICv8
Mass
0.93 Msun
0.93 to 0.97
Radius
0.90 Rsun
0.90 to 0.96
Age
3.72 Gyr
single adopted value
Luminosity
-0.17 log(Lsun)
-0.17 to -0.15
Distance
90.06 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.90 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-291
0.90 R☉
System Layout
Known planets
1 planets linked to this host
K2-291 b
Transit
◌
Discovery
2019
Period
2.23 days
Radius
1.59 R⊕
Mass
6.49 M⊕
Eq. Temp
—
K2-291 and Its Super-Earth
K2-291 is a star 294 light-years away with one known planet. The host star is 3.72 billion years old and has a mass of 0.934 solar masses, a radius of 0.899 solar radii, and a temperature of 5520 K, making it smaller, less massive, and cooler than the Sun.
The planet K2-291 b is a Super-Earth discovered by transit in 2019. A transit occurs when a planet crosses in front of its star from our viewpoint. K2-291 b has a mass of 6.49 Earth masses, a radius of 1.59 Earth radii, and an orbital period of 2.23 days. Its radius is larger than Earth's, and its mass is larger than Earth's. Its mean density is 8.91 g/cm³, 1.62 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5520 | 0.93 | 0.90 | — | — | — | 90.06 | Dai et al. 2019 | TICv8 |
| 5509 | — | 0.92 | — | — | — | 90.06 | ExoFOP | TICv8 |
| 5520 | 0.93 | 0.93 | — | — | — | 90.06 | Howard et al. 2025 | TICv8 |
| 5416.2 | — | 0.96 | — | -0.15 | — | 90.06 | Gaia DR2 | TICv8 |
| 5509 | 0.97 | 0.92 | — | -0.16 | — | 90.06 | TICv8 | TICv8 |
| 5520 | 0.93 | 0.90 | 3.72 | -0.17 | — | 90.06 | Kosiarek et al. 2019 | TICv8 |