The TOI-1266 System
TOI-1266 is a planetary system in the constellation Draco hosting 3 confirmed exoplanets, about 118 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
Size Comparison: The Planets of TOI-1266
Planets without a measured radius are not shown.
TOI-1266: Star and Habitable Zone
TOI-1266
- Spectral type
- M2
- Surface temperature
- 3,563 K (Sun: 5,772 K)
- Mass
- 0.44 M☉
- Radius
- 0.42 R☉
- Luminosity
- 0.0263 L☉
- Age
- 4.6 billion years (Sun: 4.6)
Habitable zone of TOI-1266: 0.133–0.343 AU (conservative: 0.168–0.325 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 3 Planets in the TOI-1266 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| TOI-1266 b | Mini Neptune | 11 d | 2.52 R⊕ | 0.45 | 2020 |
| TOI-1266 c | Mini Neptune | 19 d | 1.98 R⊕ | 0.68 | 2020 |
| TOI-1266 d HZ | Super Earth | 33 d | — | — | 2025 |
Discovery History
The first planet found here, TOI-1266 b, was discovered in 2020 using the transit method. The most recent addition, TOI-1266 d, followed in 2025.
- 2020 — TOI-1266 b (Transit)
- 2020 — TOI-1266 c (Transit)
- 2025 — TOI-1266 d (Transit Timing Variations)
Frequently Asked Questions About TOI-1266
How many planets does TOI-1266 have?
TOI-1266 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the TOI-1266 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is TOI-1266?
TOI-1266 is about 118 light-years from Earth in the constellation Draco.
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