Eris
Eris is a dwarf planet in the scattered disc region beyond Neptune, composed of rock and ice.
How big is it?
2,326 km across
Diameter · rounded reference
A little perspective
About the same scale as Pluto.
Pluto: Pluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.
Measurements, assumptions & sources +
Eris
Rounded mean-radius model of Eris. 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.
Pluto
Mean-radius spherical model for Pluto; actual shape is not perfectly spherical.
NASA JPL — planetary physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
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Choose a suggestion to redraw the comparison, or open its page to learn what it is.
Why this measurement?
Why we use 2,326 km
For comparison, this page uses diameter. This is labelled rounded reference: an explicit comparison model rather than a claim that every example has the same value.
Rounded mean-radius model of Eris. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Eris dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 2,326 km | Not recorded | rounded reference | |
| 17,000,000 km² | Not recorded | rounded reference | |
| 6.589 × 10⁹ km³ | Not recorded | rounded reference | |
| 1.647 × 10¹⁹ t | Not recorded | rounded reference | |
| 0.82 m/s² | Not recorded | rounded reference |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · PlacesOrange River2,100 kmThe Orange River is a principal river in southern Africa, running from the Lesotho Highlands to the Atlantic Ocean.
Around the same scale · SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.
Nearest higher value · SpacePluto2,377 kmPluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.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.
SpaceTriton2,705 kmTriton is a natural satellite of Neptune, with a retrograde orbit and a surface of frozen nitrogen.
SpaceEuropa3,122 kmEuropa is a natural satellite of Jupiter, with a smooth icy surface thought to cover a subsurface ocean.
SpaceIo3,643 kmIo is a natural satellite of Jupiter, covered with active volcanoes and sulphur deposits.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.