Confirmed exoplanet · Database record + computed analysis
TOI-700 e
A confirmed world orbiting TOI-700, 101.5 light-years away.
An Earth-sized world
0.92 times Earth's radius, squarely in the terrestrial size range. With 0.7 Earth masses packed into that size, its density points to rock and iron rather than gas.
The orbit
Its year, one full orbit, takes just 27.8 Earth days.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about -0 °C. In the range where, with the right atmosphere, liquid water is conceivable; a real atmosphere could shift the true surface figure a lot (Earth's equilibrium value is −18 °C, yet we average +15 °C). It receives 1.27 times Earth's starlight, the same order as our own world.
Its sun
Its star is a red dwarf (3,459 K surface), type M2.5 V: small, dim, flare-prone, and destined to outlive the Sun many times over. It shares the system with 3 other known planets.
How far is that, really?
At 102 light-years, tonight's light from this system left it around the year 1924. A Voyager-speed probe would need roughly 1,796,171 years to get there.
How we found it
It was found by the transit method: the planet crosses its star's face on schedule, dimming it by a tiny, repeating fraction. The dip's depth gives the planet's size. The discovery was announced in 2023 from Transiting Exoplanet Survey Satellite (TESS).
Everything above is computed from the archive’s measured values for this planet. Where a quantity is missing, the statement is omitted rather than guessed.
About this record
The measured values come from the NASA Exoplanet Archive, and any missing value has not been determined yet; the Atlas never fills gaps with guesses. More standout worlds: Proxima b, TRAPPIST-1e, K2-18 b, 55 Cancri e, and the detection methods that found them all.