Space · Mean-diameter reference · idealized sphere
Pluto diameter and size comparison
Pluto uses a mean diameter of 2,376.6 kilometers. Its globe is smaller than Earth’s Moon, despite often appearing just as large in a cropped image.
2376600 m
Sourced measurement- Measurement
- Mean diameter · twice JPL mean radius
- Subject or version
- Mean-diameter reference · idealized sphere
- In kilometers
- 2,376.6 km (1 km = 1,000 m)
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A little more perspective
JPL lists 1,188.3 kilometers for its mean radius with a 1.6-kilometer uncertainty. The pale heart-shaped region is an illustrative identification feature, not a newly surveyed boundary or a second dimension.
The displayed diameter is 2 × 1,188.3 km = 2,376.6 km. Doubling the source radius uncertainty gives ±3.2 km for diameter. The source defines mean radius through an equivalent-volume sphere. Its review date is not a new measurement date.
Quick facts
Pluto uses a mean diameter of 2,376.6 kilometers. Its globe is smaller than Earth’s Moon, despite often appearing just as large in a cropped image.
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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.