Ceres
Ceres is a dwarf planet located in the asteroid belt between Mars and Jupiter.
How big is it?
939.4 km across
Diameter · rounded reference
A little perspective
Ceres vs Charon: diameter comparison
The mean diameter of Charon is about 1.29 times the diameter of Ceres.
Charon is a natural satellite of Pluto, composed mainly of rock and water ice.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
Ceres
Diameter: 939.4 km; rounded reference.
Rounded mean-radius model of Ceres. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
Defined examples — our methodology
The marked diameter is calibrated. Unmeasured illustration details are representative.
Charon
Mean diameter: 1,212 km; approximate.
Rounded mean-radius model of Charon. 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.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 939.4 km
We compare the diameter of Ceres. This is a rounded comparison value; check the notes for its source and scope.
Rounded mean-radius model of Ceres. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 939.4 km | Not recorded | rounded reference | |
| 2,772,000 km² | Not recorded | rounded reference | |
| 434,100,000 km³ | Not recorded | rounded reference | |
| 9.384 × 10¹⁷ t | Not recorded | rounded reference | |
| 0.27 m/s² | Not recorded | rounded reference |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valuePlaces and natural featuresSeine777 kmApproximate main-channel lengthThe Seine is a river in northern France that passes through Paris and flows into the English Channel.
Around the same scalePlanets, moons and spaceDione1,123 kmMean-equivalent diameterDione is an icy moon of Saturn, distinguished by its heavily cratered surface and bright ice cliffs.
Nearest higher valuePlanets, moons and spaceTethys1,062 kmMean diameterTethys is a mid-sized icy moon of Saturn, notable for its large impact basin and surface fractures.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
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.
SpaceCharon1,212 kmCharon is a natural satellite of Pluto, composed mainly of rock and water ice.TransportFive-hour drive at 100 km/h500 kmA five-hour drive at a set speed is the distance a vehicle covers in five hours of continuous travel without breaks.
SpaceEnceladus504.2 kmEnceladus is a natural satellite of Saturn, with an icy surface and plumes of water vapour erupting from its south pole.
SpaceMimas396.4 kmMimas is an icy moon of Saturn, visually dominated by the large Herschel impact crater.