Confirmed exoplanet · Database record + computed analysis
TIC 434398831 c
A confirmed world orbiting TIC 434398831, 707.8 light-years away.
A Neptune-class world
5.63 Earth radii, in the ice-giant size range. At only 27.0 Earth masses for that size, it must be substantially gas or volatile ices: puffy, not rocky.
The orbit
Its year, one full orbit, takes just 6.2 Earth days.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 777 °C. Hotter than Venus's surface. It receives 166.4 times the starlight Earth gets.
Its sun
Its star is Sun-like (5,638 K, G4 V; the Sun is 5,772 K). It shares the system with 1 other known planet.
How far is that, really?
At 708 light-years, tonight's light from this system left it around the year 1318. A Voyager-speed probe would need roughly 12,522,732 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.