Science

Europa — mean diameter — volumetric mean diameter

≈ 3121.60 km

The selected volumetric mean diameter for Europa — mean diameter is 3121.60 km (approximate reference).

Published reference measurement · Catalogue uniruler-preview-2026-10-19-r4

What is being measured?

Twice the published 1560.80 km mean radius (reported uncertainty 0.30 km). Equivalent-volume spherical diameter, not maximum or equatorial extent.

Use the named object, variant and dimension. A manufactured or natural object can differ from this reference.

Dimension
volumetric mean diameter
Reference value
3121.60 km
Evidence
Published reference measurement
In metres
3121600.00 m
Variant
Equivalent-volume spherical reference

Put the length in perspective

One Europa — mean diameter represents approximately 36,500,000 card lengths measured end to end. This is a length ratio; it does not calculate how the objects pack or fit.

Europa — mean diameter · 3121600.00 m

Metre · 1 m · too small to see

Foot (international) · 0.3048 m · too small to see

One of each reference, on the same linear scale. Very small lengths may not be visible. This compares length, not area or physical fit.
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