:INFO
Terrestrial around TOI-700
It is 0.95 times Earth's radius, closest in size to Venus. A year there lasts 27.81 days, on an orbit 3 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 270 K (derived from the star rather than measured), in the range where liquid water is possible. The host star TOI-700 runs at 3459 K with 0.41 times the Sun's mass.

:CHECKLIST
Where this planet stands on each testable criterion
[ ] Orbits within the zone where liquid water could persist. Yes.
[ ] A measured mass, not just a radius. No.
[ ] A measured temperature rather than one derived from the star. No.
[ ] Any detection of an atmosphere. Not recorded in the archive.

:JOURNEY
TOI-700 from the inside out
1 0.068 AU
2 0.093 AU
3 0.134 AU
4 0.163 AU

:STATS
[icon:TARGET] Radius | 0.95 Earth radii
[icon:FIRE] Equilibrium temperature | 270 K (derived)
[icon:CLOCK] One year | 27.81 days
[icon:BOLT] Orbit radius | 0.1340 AU
[icon:STAR] Host star | TOI-700 at 3459 K
[icon:USERS] Distance | 102 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.043% at each transit

:PATH
What the transit gives
The depth of the dip is the ratio of the two discs, so the radius follows.

:TIMELINE
🔭🪐📅
2020-01-01 | TOI-700 b, TOI-700 c, TOI-700 d
2023-01-01 | TOI-700 e

:NOTE
The archive lists no measured equilibrium temperature for this planet. The 270 K quoted here is derived from the star's output and the orbital distance, assuming a third of the light is reflected. It is an estimate from two numbers, not an observation.

:NOTE.half
Everything known here comes from how much light went missing. That fixes the size and leaves the mass entirely open.

:NOTE.half
TOI-700 has 4 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.

:NOTE
Found by Transiting Exoplanet Survey Satellite (TESS) in 2023. TESS scans most of the sky in 27-day stretches, so it favours bright nearby stars and short orbits over the faint distant ones Kepler specialised in.

:THREAD

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/TOI-700%20e
Every parameter ever published for TOI-700 e, at the NASA Exoplanet Archive