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TOI-700 e

TOI-700 · M2.5 V host star · cool red dwarf · main sequence

[ TOI_700_E.IMG ]
VIEW 1 · ON THE SURFACE
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Artist’s impression of TOI-700 e: VIEW 1 · ON THE SURFACE
VIEW 1 · ON THE SURFACE · Artist’s impression. No surface has been seen.
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101.5 light-years from Earth
[ FACTS.DAT ]
Right ascension / declination97.096° / -65.579°J2000 / ICRS
Gravity0.88 × Earthmodelled estimate
Year27.8 days
From its star0.1340 AUabout 20.0 million km
Stars in the system1 star4 known planets in system
Stars this world orbits1 starOrbits TOI-700
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≈3,500 Ktypical M2.5 V · 0.40 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-700 is class M2.5 V. 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. Inward of the rocky planet d, on a shorter orbit, receiving about 1.27 times Earth’s light. Radius about 0.93 Earth radii. The mass is not weighed the way d’s is; the archive only limits it, and the page’s 0.88 g is a model. The same quiet star spans about 1.6°. Warmer day side than d: less ice, more bare rock, a slush patch only if water is plentiful.

Dry case. A warmer red desert than d. Oxidized rock, no day-side ice, heat shimmer. The quiet star still does not guarantee the air stayed.

Thick-air case. Closer to an inner-edge flux than d. A cloudy or steamy sky is easier here. The small radius leaves little room for a deep hydrogen envelope.

Walking. A bit lighter than Earth if the model holds, about 12% less, and that can change. Planet c, a puffy sub-Neptune, would look about 0.6 of the Moon’s width, larger in the sky than rocky planet d. The star is the same quiet red sun, bigger in the sky than it looks from d.

Based on: Gilbert et al. 2023 discovery of e; ESPRESSO mass of e is an upper limit under about 1.2 Earth masses; Rp 0.93, S 1.27, a 0.134 AU

[ ORBIT.SYS ]4 KNOWN · ALL SHOWN
100% · Above 30°

TOI-700 e circles TOI-700. Also shown: TOI-700 b, TOI-700 c, TOI-700 d, 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.