The star
The star
TOI-125
- Type
- K0 V
- Surface
- ≈ 5,320 K
- Size
- 0.85 × the Sun
- Mass
- 0.86 × the Sun
- Brightness
- 0.519 × the Sun
- Habitable zone
- 0.555–1.33 AU
The planets
TOI-125
TOI-125 b
- Year
- 4.65 days
- Distance from star
- 0.0519 AU
- Mass
- 9.5 Earths
- Size
- 2.7 × Earth
- Temperature
- ≈ 1037 K (+764 °C)
- Found
- 2019, transit (Transiting Exoplanet Survey Satellite (TESS))
TOI-125
TOI-125 c
- Year
- 9.15 days
- Distance from star
- 0.0814 AU
- Mass
- 6.6 Earths
- Size
- 2.8 × Earth
- Temperature
- ≈ 828 K (+555 °C)
- Found
- 2019, transit (Transiting Exoplanet Survey Satellite (TESS))
TOI-125
TOI-125 d
- Year
- 19.98 days
- Distance from star
- 0.137 AU
- Mass
- 14 Earths
- Size
- 2.9 × Earth
- Temperature
- ≈ 638 K (+365 °C)
- Found
- 2020, transit (Transiting Exoplanet Survey Satellite (TESS))
Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.
How we know
The shadow
The planet passes in front of its star and dims it by a fraction of a percent, every orbit. The dip gives the planet's size and year.
Sources
- Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
- Position: HYG Database v4.1 (CC BY-SA 4.0).
- Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.