Confirmed exoplanet · Database record + computed analysis
Kepler-39 b
A confirmed world orbiting Kepler-39, 3,448.8 light-years away.
A gas giant
13.90 Earth radii, Jupiter-class (Jupiter is 11.2). With 6388.1 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 21.1 Earth days.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 624 °C. Hotter than Venus's surface. It receives 90.2 times the starlight Earth gets.
Its sun
Its star is hotter than the Sun (6,350 K, F7 V), burning brighter and faster.
How far is that, really?
At 3,449 light-years, tonight's light from this system left it around the year -1422. A Voyager-speed probe would need roughly 61,018,392 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 2011 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.