Confirmed exoplanet · Database record + computed analysis
TOI-4633 c
A confirmed world orbiting TOI-4633, 310.5 light-years away.
A sub-Neptune
3.20 Earth radii, likely a rocky core under a thick gas or steam envelope rather than a walkable surface. With 123.0 Earth masses packed into that size, its density points to rock and iron rather than gas.
The orbit
Its year takes 272 Earth days (0.7 Earth years).
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about -5 °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 1.56 times Earth's starlight, the same order as our own world.
Its sun
Its star is Sun-like (5,800 K, G V; the Sun is 5,772 K). The system holds 2 stars, so its skies have more than one sun.
How far is that, really?
At 311 light-years, tonight's light from this system left it around the year 1715. A Voyager-speed probe would need roughly 5,493,658 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 2024 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.