Space · Mean-diameter reference · idealized sphere
Europa diameter and size comparison
Europa uses a mean diameter of 3,121.6 kilometers. It is smaller across than Earth’s Moon and substantially smaller than Ganymede at the same scene scale.
3121600 m
Sourced measurement- Measurement
- Mean diameter · twice JPL mean radius
- Subject or version
- Mean-diameter reference · idealized sphere
- In kilometers
- 3,121.6 km (1 km = 1,000 m)
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A little more perspective
Its diameter doubles JPL’s 1,560.80-kilometer mean radius. The fine crossing lines identify an icy surface in the illustration; they do not encode a measured crack width, ocean depth, or ice-shell thickness.
The displayed diameter is 2 × 1,560.8 km = 3,121.6 km. Doubling the source radius uncertainty gives ±0.6 km for diameter. The source defines mean radius through an equivalent-volume sphere. Its review date is not a new measurement date.
Quick facts
Europa uses a mean diameter of 3,121.6 kilometers. It is smaller across than Earth’s Moon and substantially smaller than Ganymede at the same scene scale.
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Sources and measurement notes
Source review recorded . Maintained by Ishan Karunaratne. Suggest a correction with a source and the exact measurement being compared.