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TOI-1266 d

TOI-1266 · M2 host star · cool red dwarf

[ TOI_1266_D.IMG ]
VIEW 1 · ON THE SURFACE
1 / 2
Artist’s impression of TOI-1266 d: VIEW 1 · ON THE SURFACE
VIEW 1 · ON THE SURFACE · Artist’s impression. No surface has been seen.
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117.5 light-years from Earth
[ FACTS.DAT ]
Right ascension / declination197.997° / 65.834°J2000 / ICRS
Gravity1.22 × Earthmodelled estimate
Year32.5 days
From its star0.1513 AUabout 22.6 million km
Stars in the system1 star3 known planets in system
Stars this world orbits1 starOrbits TOI-1266
Day and nightLikely synchronous spinProbably spins once per orbit, keeping one hemisphere in permanent day and the other in permanent night. Heuristic: likely at ≤0.25 AU, uncertain to 0.50 AU, probably not beyond; rotation is not directly measured.
[ TEMP.EST ]MODELLED, NOT MEASURED
Host star≈3,550 Ktypical M2 · 0.44 Sun radii
No atmosphere267 K · -6°C30% reflective · heat shared
Earth-like air300 K · 27°CBaseline plus 33°C

Star temperature and orbital distance set incoming energy, but stellar size is also required. This calculation uses a typical radius for the listed spectral type, 30% reflectivity and even heat redistribution. It is not a ground-temperature forecast: air, clouds, oceans and surface reflectivity could move the result by tens to hundreds of degrees. A likely synchronous spin also means the permanent day and night sides would not share one ground temperature.

[ STARLIGHT.SPC ]VISIBLE LIGHT ONLY

The marker above the bar is a typical temperature for this star’s class. The line below is Earth’s Sun.

red-orange

TOI-1266 is class M2. Its visible daylight would be dim and strongly red-orange; most of its energy is infrared.

Representative lit-side geometry only. On a locked world, the star’s real elevation would depend on where you stand.

[ GROUND.TXT ]STILL INFERENCE

Most plausible case. The outer of three, receiving about 1.3 times Earth’s light around a 0.42-solar-radius star that spans about 1.5°. Radius about 1.74 Earth radii, so a rocky core plus volatiles is as plausible as bare rock. Eccentricity near 0.09 is a mild swing. Warm day side, ice only on the night side if the planet is locked, which this 0.15 AU orbit around a mid-M star suggests but does not prove.

Dry case. Warm rock and dunes, little ice. A 1.7-radius dry planet is a heavy desert if the volatiles were lost.

Thick-air case. The radius makes a cloudy, volatile-rich sky a strong option. You may not see ground at all.

Walking. About 22% heavier than Earth, modelled. TOI-1266 c would look about 0.4 of the Moon’s width. The star is magnitude 13, 118 light-years away.

Based on: NASA composite; Teff 3563 K, R 0.42 Rsun, S 1.3, e 0.087, Rp 1.74, a 0.151 AU

[ ORBIT.SYS ]3 KNOWN · ALL SHOWN
100% · Above 30°

TOI-1266 d circles TOI-1266. Also shown: TOI-1266 b, TOI-1266 c, each on its NASA-catalogued orbit. Use Higher and Lower to move your viewpoint above, through and below the orbital plane, and − / + to zoom. Orbit shapes and spacing are schematic.

[ SOURCES.TXT ]

Positions, distances, and system parameters come from the NASA Exoplanet Archive composite table, queried 25 Sep 2026. GJ 273 b uses the parallax in that row, 12.4 light-years. The 45 worlds follow Bohl, Lawrence, Lowry, and Kaltenegger.