Confirmed exoplanet · Database record + computed analysis
BD+15 2940 b
A confirmed world orbiting BD+15 2940, 1,390.8 light-years away.
A gas giant
13.70 Earth radii, Jupiter-class (Jupiter is 11.2). At only 352.8 Earth masses for that size, it must be substantially gas or volatile ices: puffy, not rocky.
The orbit
Its year takes 137 Earth days (0.4 Earth years).
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 935 °C. Hot enough to melt copper; any surface would glow. It receives 352.2 times the starlight Earth gets.
Its sun
Its star is an orange K-type (4,796 K), K0: cooler and longer-lived than the Sun, a class some astronomers consider ideal for habitability.
How far is that, really?
At 1,391 light-years, tonight's light from this system left it around the year 635. A Voyager-speed probe would need roughly 24,606,787 years to get there.
How we found it
It was found by the radial-velocity method: the planet's gravity swings its star in a small circle, and that wobble shows up as a rhythmic Doppler shift in the starlight. The wobble's size gives the planet's minimum mass. The discovery was announced in 2013 from McDonald Observatory.
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.