Temperature
3434 K
3434 to 3575
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Stellar HostProfile
TOI-1685
M3.0 V • 37.62 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
TIC: TIC 28900646
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: Bluhm et al. 2021 • System source: TICv8
Mass
0.49 Msun
0.45 to 0.49
Radius
0.49 Rsun
0.46 to 0.49
Age
1.30 Gyr
1 to 1.40
Luminosity
-1.52 log(Lsun)
-1.57 to -1.52
Distance
37.62 pc
single adopted value
Spectral Type
M3.0 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.49 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
TOI-1685
0.49 R☉
System Layout
Known planets
1 planets linked to this host
TOI-1685 b
Transit
◌
Discovery
2021
Period
0.67 days
Radius
1.42 R⊕
Mass
3.07 M⊕
Eq. Temp
1000 K
TOI-1685 and Its Earth-Sized Planet
TOI-1685 is an M3.0 V star, a small, cool red dwarf, located 123 light-years away. Its measured mass is 0.495 solar masses, its radius is 0.492 solar radii, and its temperature is 3430 K, all smaller or cooler than the Sun's corresponding values. The star is estimated to be 1.3 billion years old. One planet is known to orbit this host.
That planet, TOI-1685 b, was found by the transit method in 2021, when it passed in front of its star and produced a small dip in observed brightness. It has a radius of 1.42 Earth radii, placing it in the Earth-like size class, and a mass of 3.07 Earth masses, both larger than Earth's. Its mean density is 5.9 g/cm³, 1.07 times Earth's.
TOI-1685 b completes an orbit in just 0.669 days, giving it one of the shortest orbital periods known among planets detected around cool dwarf stars.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3575 | 0.45 | 0.46 | 1 | -1.52 | M2.65 V | 37.62 | Burt et al. 2024 | TICv8 |
| 3457 | — | 0.46 | — | — | — | 37.62 | ExoFOP | TICv8 |
| 3461 | 0.46 | 0.46 | — | -1.57 | — | 37.62 | Hirano et al. 2021 | TICv8 |
| — | — | — | — | — | M2.5 V | 37.62 | Luque et al. 2025 | TICv8 |
| — | 0.45 | 0.46 | — | — | M2.5 V | 37.62 | Fisher et al. 2026 | TICv8 |
| 3457 | 0.46 | 0.46 | — | -1.56 | — | 37.62 | TICv8 | TICv8 |
| 3434 | 0.49 | 0.49 | 1.30 | -1.52 | M3.0 V | 37.62 | Bluhm et al. 2021 | TICv8 |
| 3470 | 0.47 | 0.46 | 1.40 | — | M3 V | 37.62 | Egger et al. 2025 | TICv8 |