Temperature
3816 K
3753 to 3870.1
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Stellar HostProfile
GJ 685
M0.5 โข 14.32 pc
Records
8
literature rows
Planets
1
system count
References
8
distinct source labels
TIC: TIC 219780306HIP: HIP 86087
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: Pinamonti et al. 2019 โข System source: TICv8
Mass
0.55 Msun
0.49 to 0.55
Radius
0.54 Rsun
0.54 to 0.58
Luminosity
-1.25 log(Lsun)
-1.25 to -1.22
Distance
14.32 pc
single adopted value
Spectral Type
M0.5
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.54 Rโ (circles scaled linearly by radius)
Sun
1.0 Rโ baseline
GJ 685
0.54 Rโ
System Layout
Known planets
1 planets linked to this host
GJ 685 b
Radial Velocity
โ
Discovery
2019
Period
24.16 days
Radius
โ
Mass
9 Mโ
Eq. Temp
โ
GJ 685 and Its Planet
GJ 685 is an M0.5 star located 46.7 light-years away. Its spectral type marks it as a small, cool red dwarf. The star has a mass of 0.55 solar masses and a radius of 0.54 solar radii, both smaller than the Sun's. Its temperature is 3820 K, cooler than the Sun's. One known planet orbits this star.
GJ 685 b was discovered in 2019 using the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. The planet has a minimum mass of 9 Earth masses, a lower bound on its true mass, and this minimum mass is larger than Earth's. It completes one orbit every 24.2 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
7
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 |
|---|---|---|---|---|---|---|---|---|
| โ | โ | โ | โ | โ | M0.5 | 14.32 | Hawley et al. 1996 | TICv8 |
| 3761 | 0.49 | 0.58 | โ | -1.22 | M1 | 14.32 | Turnbull 2015 | TICv8 |
| โ | โ | โ | โ | โ | โ | 14.32 | Duncan et al. 1991 | TICv8 |
| 3753 | 0.55 | 0.56 | โ | -1.25 | โ | 14.32 | TICv8 | TICv8 |
| 3870.1 | โ | 0.54 | โ | -1.22 | โ | 14.32 | Gaia DR2 | TICv8 |
| 3816 | 0.55 | 0.54 | โ | -1.25 | M0.5 | 14.32 | Pinamonti et al. 2019 | TICv8 |
| โ | โ | โ | โ | โ | โ | 14.32 | Pizzolato et al. 2003 | TICv8 |
| โ | โ | โ | โ | โ | โ | 14.32 | Duncan et al. 1991 | TICv8 |