Confirmed exoplanet · Database record + computed analysis
Kepler-30 d
A confirmed world orbiting Kepler-30, 2,981.8 light-years away.
A gas giant
8.80 Earth radii, Jupiter-class (Jupiter is 11.2). At only 23.1 Earth masses for that size, it must be substantially gas or volatile ices: puffy, not rocky.
The orbit
Its year takes 143 Earth days (0.4 Earth years).
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 35 °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 1.96 times Earth's starlight, the same order as our own world.
Its sun
Its star is Sun-like (5,498 K; the Sun is 5,772 K). It shares the system with 2 other known planets.
How far is that, really?
At 2,982 light-years, tonight's light from this system left it around the year -955. A Voyager-speed probe would need roughly 52,755,596 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 2012 from Kepler.
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.