Confirmed exoplanet · Database record + computed analysis
V1298 Tau d
A confirmed world orbiting V1298 Tau, 352.9 light-years away.
A Neptune-class world
6.53 Earth radii, in the ice-giant size range. At only 6.0 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 12.4 Earth days.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 558 °C. Hotter than Venus's surface. It receives 85.0 times the starlight Earth gets.
Its sun
Its star is an orange K-type (4,970 K), K1: cooler and longer-lived than the Sun, a class some astronomers consider ideal for habitability. The system holds 3 stars, so its skies have more than one sun. It shares the system with 3 other known planets.
How far is that, really?
At 353 light-years, tonight's light from this system left it around the year 1673. A Voyager-speed probe would need roughly 6,243,679 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 2019 from K2.
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.