Confirmed exoplanet · Database record + computed analysis
TOI-5728 b
A confirmed world orbiting TOI-5728, 178.4 light-years away.
A super-Earth
1.31 Earth radii. Worlds between Earth and Neptune in size are the most common in the galaxy, yet our Solar System has none, which is why each one matters. With 2.3 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 11.5 Earth days. Orbiting this tightly around a cool star, it is very likely tidally locked: one hemisphere in permanent day, the other in permanent night.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 109 °C. Above water's boiling point. It receives 3.5 times the starlight Earth gets.
Its sun
Its star is a red dwarf (3,419 K surface): small, dim, flare-prone, and destined to outlive the Sun many times over.
How far is that, really?
At 178 light-years, tonight's light from this system left it around the year 1847. A Voyager-speed probe would need roughly 3,156,751 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 2025 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.