Confirmed exoplanet · Database record + computed analysis
51 Eri b
A confirmed world orbiting 51 Eri, 97.1 light-years away.
A giant planet
about 3464 Earth masses (Jupiter is 318).
The orbit
Its year takes 9,100 Earth days (24.9 Earth years). The orbit is strongly stretched (eccentricity 0.57), so its distance from the star, and with it the climate, swings dramatically.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 534 °C. Hotter than Venus's surface. It receives only 0.05 times Earth's starlight.
Its sun
Its star is hotter than the Sun (7,422 K, F0 IV), burning brighter and faster. The system holds 3 stars, so its skies have more than one sun.
How far is that, really?
At 97 light-years, tonight's light from this system left it around the year 1928. A Voyager-speed probe would need roughly 1,717,172 years to get there.
How we found it
It was directly imaged, one of the rare planets actually photographed as its own point of light, possible only for young, hot, wide-orbiting giants. The discovery was announced in 2015 from Gemini 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.