Confirmed exoplanet · Database record + computed analysis
HD 48265 b
A confirmed world orbiting HD 48265, 295.3 light-years away.
A gas giant
12.60 Earth radii, Jupiter-class (Jupiter is 11.2). With 2351.9 Earth masses packed into that size, its density points to rock and iron rather than gas.
The orbit
Its year takes 779 Earth days (2.1 Earth years).
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about 10 °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 1.17 times Earth's starlight, the same order as our own world.
Its sun
Its star is Sun-like (5,733 K, G5 IV/V; the Sun is 5,772 K). It shares the system with 1 other known planet.
How far is that, really?
At 295 light-years, tonight's light from this system left it around the year 1730. A Voyager-speed probe would need roughly 5,224,923 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 2008 from Las Campanas 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.