Callisto
Callisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
4,821 kmMean diameterWorlds apart
Callisto vs Ganymede
What are they, and what does the difference actually look like?
Two things. One honest scale.
Meet the pair
What these two things are
Ganymede
Ganymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
5,262 kmMean diameterGanymede has about 1.09 times the mean diameter of Callisto.
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.
Measurements, assumptions & sources +
Callisto
Rounded mean-radius model of Callisto. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
Ganymede
Rounded mean-radius model of Ganymede. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
Change the comparison
Put something else beside it.
Measurement details
Why these numbers?
The visual compares mean diameter with mean diameter. The records below preserve each value’s basis and caveats.
Callisto
4,821 kmMean diameter · approximate
Rounded mean-radius model of Callisto. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
Ganymede
5,262 kmMean diameter · approximate
Rounded mean-radius model of Ganymede. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
- Comparing
- Mean diameter ↔ Mean diameter
- Relative size
- Ganymede is larger on this measurement by a factor of about 1.09. Ganymede's selected measurement is approximately 9.16% greater than Callisto's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Callisto is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
- Ganymede is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
There’s always another scale
Follow your curiosity.
SpaceCallisto4,821 kmCallisto is a natural satellite of Jupiter, with a heavily cratered icy surface.SpaceGanymede5,262 kmGanymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpacePluto2,377 kmPluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.
SpaceJupiter139,800 kmJupiter is a giant planet composed mainly of hydrogen and helium, orbiting the Sun beyond the asteroid belt.Side by side
Another point of view.
