Temperature
5320 K
5150 to 5320
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Stellar HostProfile
TOI-125
K0 V • 111.1 pc
Records
9
literature rows
Planets
3
system count
References
7
distinct source labels
TIC: TIC 52368076
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: Nielsen et al. 2020 • System source: TICv8
Mass
0.86 Msun
0.86 to 0.91
Radius
0.85 Rsun
0.85 to 0.90
Age
6.80 Gyr
6.60 to 6.80
Luminosity
-0.28 log(Lsun)
-0.29 to -0.28
Distance
111.1 pc
single adopted value
Spectral Type
K0 V
Consistent across records
Planets
3
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.85 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
TOI-125
0.85 R☉
System Layout
Known planets
3 planets linked to this host
TOI-125: A Nearby K-Type Star and Its Three Neptune-Like Worlds
TOI-125 is a K0 V star located 362 light-years from Earth. This makes it a main-sequence dwarf somewhat cooler and less massive than the Sun. Its reported mass is 0.859 solar masses, its radius is 0.848 solar radii, and its temperature is 5320 K. The star is estimated to be 6.8 billion years old. Three planets are known to orbit this host: TOI-125 b, TOI-125 c, and TOI-125 d. All three were discovered by the transit method - detected as they passed in front of their star, causing small dips in brightness - and all three are classified as Neptune-like.
TOI-125 b was discovered in 2019. It has a mass of 9.5 Earth masses, a radius of 2.73 Earth radii, and an orbital period of 4.65 days. TOI-125 c was also discovered in 2019 and has a mass of 6.63 Earth masses, a radius of 2.76 Earth radii, and an orbital period of 9.15 days. TOI-125 d, discovered in 2020, is the most massive and largest of the three, with a mass of 13.6 Earth masses and a radius of 2.93 Earth radii. Its orbital period is 20 days.
All three planets are larger and more massive than Earth, and each has a mean density below Earth's: 2.58 g/cm³ for TOI-125 b, 1.74 g/cm³ for TOI-125 c, and 2.98 g/cm³ for TOI-125 d, corresponding to 0.469, 0.316, and 0.541 times Earth's density, respectively. Among these planets, TOI-125 b has the shortest year at 4.65 days, TOI-125 c has the second-shortest at 9.15 days, and TOI-125 d has the longest at 20 days. TOI-125 b also has the smallest radius at 2.73 Earth radii, TOI-125 c has the second-smallest at 2.76 Earth radii, and TOI-125 d has the largest at 2.93 Earth radii. In mass, TOI-125 c has the smallest reported value at 6.63 Earth masses, TOI-125 b has the second-smallest at 9.5 Earth masses, and TOI-125 d has the largest at 13.6 Earth masses.
Provenance
Underlying measurements and references
Evidence Summary
Rows
9
Stellar refs
6
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typestable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5154 | — | 0.85 | — | — | — | 111.1 | ExoFOP | TICv8 |
| 5280 | 0.91 | 0.85 | — | -0.29 | — | 111.1 | TICv8 | TICv8 |
| 5154 | — | 0.85 | — | — | — | 111.1 | ExoFOP | TICv8 |
| 5282 | 0.87 | 0.85 | 6.60 | -0.29 | K0 V | 111.1 | Quinn et al. 2019 | TICv8 |
| 5150 | — | 0.90 | — | -0.29 | — | 111.1 | Gaia DR2 | TICv8 |
| 5216.3 | — | 0.85 | — | — | — | 111.1 | Lafarga et al. 2026 | TICv8 |
| 5154 | — | 0.85 | — | — | — | 111.1 | ExoFOP | TICv8 |
| 5154 | — | 0.85 | — | — | — | 111.1 | ExoFOP | TICv8 |
| 5320 | 0.86 | 0.85 | 6.80 | -0.28 | K0 V | 111.1 | Nielsen et al. 2020 | TICv8 |