Temperature
5503 K
5287.7 to 5537
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Stellar HostProfile
K2-261
Unclassified star • 213.3 pc
Records
9
literature rows
Planets
1
system count
References
9
distinct source labels
TIC: TIC 281731203
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: Ikwut-Ukwa et al. 2020 • System source: TICv8
Mass
1.27 Msun
0.96 to 1.27
Radius
1.64 Rsun
1.64 to 1.83
Age
4.83 Gyr
4.83 to 9.30
Luminosity
0.35 log(Lsun)
0.33 to 0.38
Distance
213.3 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.64 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-261
1.64 R☉
System Layout
Known planets
1 planets linked to this host
K2-261 b
Transit
◌
Discovery
2018
Period
11.63 days
Radius
9.27 R⊕
Mass
68.97 M⊕
Eq. Temp
1036 K
K2-261 and Its Jupiter-Like Planet
K2-261 is a star 696 light-years away with a spectral type of G7 IV/V. It has an age of 4.83 billion years, a mass of 1.27 solar masses, a radius of 1.64 solar radii, and a temperature of 5500 K. Its reported mass and radius are larger than the Sun's, while its temperature is cooler. One planet orbits this host.
K2-261 b is a Jupiter-like planet discovered in 2018 by the transit method, in which a planet passing in front of its star causes a small dip in observed brightness. It has a mass of 69 Earth masses, a radius of 9.27 Earth radii, and an orbital period of 11.6 days. Both its reported mass and radius are larger than Earth's, and its mean density is 0.477 g/cm³, 0.0866 times Earth's.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5490 | 1.11 | 1.66 | 8.80 | 0.35 | — | 213.3 | Thygesen et al. 2023 | TICv8 |
| 5445 | 1.09 | 1.64 | 9.30 | 0.33 | — | 213.3 | Ikwut-Ukwa et al. 2020 | TICv8 |
| 5287.7 | — | 1.83 | — | 0.37 | — | 213.3 | Gaia DR2 | TICv8 |
| 5537 | 1.10 | 1.65 | 8.80 | — | G7 IV/V | 213.3 | Johnson et al. 2018 | TICv8 |
| 5466 | 0.96 | 1.73 | — | 0.38 | — | 213.3 | TICv8 | TICv8 |
| 5478 | 1.09 | 1.68 | — | — | — | 213.3 | Howard et al. 2025 | TICv8 |
| 5503 | 1.27 | 1.64 | 4.83 | 0.35 | — | 213.3 | Ikwut-Ukwa et al. 2020 | TICv8 |
| 5287.7 | — | 1.73 | — | — | — | 213.3 | ExoFOP | TICv8 |
| 5537 | 1.10 | 1.67 | 8.80 | — | — | 213.3 | Knudstrup et al. 2024 | TICv8 |