Confirmed exoplanet · Database record + computed analysis
HIP 57274 c
A confirmed world orbiting HIP 57274, 84.3 light-years away.
A gas giant
14.20 Earth radii, Jupiter-class (Jupiter is 11.2). At only 130.0 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 32.0 Earth days.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 164 °C. Above water's boiling point. It receives 48.9 times the starlight Earth gets.
Its sun
Its star is an orange K-type (4,640 K), K4 V: cooler and longer-lived than the Sun, a class some astronomers consider ideal for habitability. It shares the system with 2 other known planets.
How far is that, really?
At 84 light-years, tonight's light from this system left it around the year 1941. A Voyager-speed probe would need roughly 1,492,369 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 2011 from W. M. Keck 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.