TOI-1266 d is a planet in a multi-world system located approximately 120 light-years away in the constellation Draco.

Key Physical Characteristics

• Planet Type: Terrestrial (rocky) world.
• Size: It is likely a “Super-Earth,” estimated at about 1.2 to 1.5 times the radius of Earth.
• Orbit: It completes one orbit around its star every 32 Earth days.
• The Star: TOI-1266 is a red dwarf that is notably “quiet.” It does not exhibit the violent flaring that often strips atmospheres away from planets orbiting this type of star.

Habitability & Environment

In Lisa Kaltenegger’s research, TOI-1266 d is a key target because of its stable environment:

• Location: It sits within the Habitable Zone, where temperatures could allow for liquid water to exist on the surface.
• Energy Intake: It receives a temperate level of starlight, though its actual surface temperature depends heavily on the thickness of its atmosphere.
• System Dynamics: The system contains two inner planets (b and c) that are much hotter. This allows scientists to compare how planets at different distances from the same star evolve.

Scientific Significance

• Atmospheric Testing: Because the host star is relatively bright for a red dwarf, TOI-1266 d is a candidate for studying the chemical makeup of its air as it passes in front of the star.
• Density Studies: Astronomers are working to confirm if it is a purely rocky world or if it contains a significant amount of water-ice.
• Stability: The lack of intense stellar activity from its sun makes it a “safe” place for a long-lived atmosphere to exist, which is a primary requirement for the development of life.

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Published @ March 24, 2026 9:28 am