Temperature
3207 K
3180 to 3740.8
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Stellar HostProfile
K2-25
M4.5 V • 44.96 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
TIC: TIC 434226736
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: Stefansson et al. 2020 • System source: TICv8
Mass
0.26 Msun
0.26 to 0.29
Radius
0.29 Rsun
0.29 to 0.29
Age
0.73 Gyr
single adopted value
Luminosity
-2.09 log(Lsun)
-2.10 to -2.08
Distance
44.96 pc
single adopted value
Spectral Type
M4.5 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.29 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-25
0.29 R☉
System Layout
Known planets
1 planets linked to this host
K2-25 b
Transit
◌
Discovery
2015
Period
3.48 days
Radius
3.44 R⊕
Mass
24.50 M⊕
Eq. Temp
494 K
K2-25 and Its Neptune-Like Planet
K2-25 is an M4.5 V star, a small, cool red dwarf, located 147 light-years from Earth. It has a mass of 0.263 solar masses and a radius of 0.293 solar radii. Its temperature is 3210 K, and its age is 0.73 billion years. The star's reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's.
One planet orbits this host. K2-25 b was discovered by the transit method in 2015. The transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness. This planet has an orbital period of 3.48 days, a mass of 24.5 Earth masses, and a radius of 3.44 Earth radii. Both its reported radius and mass estimates are larger than Earth's. Its mean density is 3.32 g/cm³, 0.602 times Earth's. As a Neptune-like planet, it falls within the size class reaching 4 times Earth's radius.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3204 | 0.27 | 0.29 | — | -2.10 | — | 44.96 | TICv8 | TICv8 |
| — | — | — | — | — | — | 44.96 | Rizzuto et al. 2017 | TICv8 |
| 3204 | — | 0.29 | — | — | — | 44.96 | ExoFOP | TICv8 |
| 3207 | 0.26 | 0.29 | 0.73 | -2.09 | M4.5 V | 44.96 | Stefansson et al. 2020 | TICv8 |
| 3180 | 0.29 | 0.29 | — | -2.08 | M4.5 | 44.96 | Mann et al. 2016 | TICv8 |
| — | — | — | — | — | — | 44.96 | Gaidos et al. 2020 | TICv8 |
| 3740.8 | — | — | — | — | — | 44.96 | Gaia DR2 | TICv8 |
| 3207 | 0.26 | 0.29 | — | -2.09 | — | 44.96 | Thao et al. 2020 | TICv8 |