Temperature
3600 K
3573 to 3600
←Back to Stellar Hosts
Stellar HostProfile
GJ 806
M1.5 V • 12.04 pc
Records
7
literature rows
Planets
2
system count
References
8
distinct source labels
HIP: HIP 102401TIC: TIC 239332587
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: Palle et al. 2023 • System source: TICv8
Mass
0.41 Msun
0.40 to 0.42
Radius
0.41 Rsun
0.41 to 0.43
Age
5 Gyr
single adopted value
Luminosity
-1.59 log(Lsun)
-1.59 to -1.52
Distance
12.04 pc
single adopted value
Spectral Type
M1.5 V
Multiple classifications reported
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.41 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
GJ 806
0.41 R☉
System Layout
Known planets
2 planets linked to this host
GJ 806 and Its Two Known Planets
GJ 806 is an M1.5 V star, a small, cool red dwarf, located 39.3 light-years away. Its age is 5 billion years, its mass is 0.413 solar masses, its radius is 0.414 solar radii, and its temperature is 3600 K. The star's reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's.
Two planets are known to orbit this star. GJ 806 b was discovered by the transit method in 2023. Its mass is 1.9 Earth masses and its radius is 1.33 Earth radii, both larger than Earth's. Its mean density is 4.44 g/cm³, 0.806 times Earth's. Classified as Earth-like, it completes an orbit in 0.926 days, the shortest year among the listed planets.
GJ 806 c was also discovered in 2023, using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. Its minimum mass is 5.8 Earth masses, larger than Earth's, and its orbital period is 6.64 days, the longest year among the listed planets.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
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 |
|---|---|---|---|---|---|---|---|---|
| 3573 | 0.42 | 0.43 | — | -1.58 | — | 12.04 | TICv8 | TICv8 |
| 3600 | 0.41 | 0.41 | 5 | -1.59 | M1.5 V | 12.04 | Palle et al. 2023 | TICv8 |
| — | — | — | — | — | — | 12.04 | Nidever et al. 2002 | TICv8 |
| 3573 | — | 0.43 | — | — | — | 12.04 | ExoFOP | TICv8 |
| 3584 | 0.40 | 0.43 | — | -1.52 | M3 | 12.04 | Turnbull 2015 | TICv8 |
| — | — | — | — | — | — | 12.04 | Wright et al. 2004 | TICv8 |
| — | — | — | — | — | M1.5 | 12.04 | Hawley et al. 1996 | TICv8 |