Space · Mean-diameter reference · idealized sphere
Ceres diameter and size comparison
Ceres uses a mean diameter of 939.4 kilometers from JPL’s planetary parameter table. Its irregular and flattened real shape is represented by a sphere for this comparison.
939400 m
Sourced measurement- Measurement
- Mean diameter · twice JPL mean radius
- Subject or version
- Mean-diameter reference · idealized sphere
- In kilometers
- 939.4 km (1 km = 1,000 m)
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A little more perspective
JPL lists a 469.7-kilometer mean radius and a 482.1-kilometer equatorial radius. No uncertainty is supplied for this radius field in that table. Other rounded outreach values should not silently replace the explicitly chosen mean-radius reference.
The displayed diameter is 2 × 469.7 km = 939.4 km. The cited radius field supplies no uncertainty; none is invented here. The source defines mean radius through an equivalent-volume sphere. Its review date is not a new measurement date.
Quick facts
Ceres uses a mean diameter of 939.4 kilometers from JPL’s planetary parameter table. Its irregular and flattened real shape is represented by a sphere for this comparison.
For a presentation or a research note, include the subject, the measurement definition, and the measurement used. A picture alone cannot explain those choices. The comparison guide explains how to export an image and its source notes together.
Sources and measurement notes
Source review recorded . Maintained by Ishan Karunaratne. Suggest a correction with a source and the exact measurement being compared.