Temperature
3485 K
3433 to 3485
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Stellar HostProfile
GJ 238
M2.5 V • 15.21 pc
Records
5
literature rows
Planets
1
system count
References
6
distinct source labels
HIP: HIP 31300TIC: TIC 260708537
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: Tey et al. 2024 • System source: TICv8
Mass
0.42 Msun
0.41 to 0.42
Radius
0.43 Rsun
0.43 to 0.49
Luminosity
-1.62 log(Lsun)
-1.62 to -1.52
Distance
15.21 pc
single adopted value
Spectral Type
M2.5 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.43 R☉ • circles scaled linearly by radius
Sun
1.0 R☉ baseline
GJ 238
0.43 R☉
System Layout
Known planets
1 planets linked to this host
GJ 238 b
Transit
◌
Discovery
2024
Period
1.74 days
Radius
0.57 R⊕
Mass
—
Eq. Temp
758 K
GJ 238 b: A Sub-Earth Around a Cool Red Dwarf
GJ 238 is an M2.5 V star, a small, cool red dwarf, located 49.6 light-years from us. Its mass is 0.419 solar masses, its radius is 0.431 solar radii, and its temperature is 3490 K. One planet is known to orbit this star.
That planet is GJ 238 b, a Sub-Earth discovered by transit in 2024. It orbits its host with an orbital period of 1.74 days and has a radius of 0.566 Earth radii.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitystable
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | M2.5 | 15.21 | Hawley et al. 1996 | TICv8 |
| 3485 | 0.42 | 0.43 | — | -1.62 | M2.5 V | 15.21 | Tey et al. 2024 | TICv8 |
| 3445 | — | 0.43 | — | — | — | 15.21 | ExoFOP | TICv8 |
| 3433 | 0.41 | 0.49 | — | -1.52 | M | 15.21 | Turnbull 2015 | TICv8 |
| 3470 | 0.42 | 0.43 | — | -1.62 | — | 15.21 | TICv8 | TICv8 |