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Length & distance

Just how long is 500 miles?

Our planet

500 mi

Scale
500 miles

The quantity is exact as entered.

804.7 kmLength
0 - shared origin
Charon

Charon is a natural satellite of Pluto, composed mainly of rock and water ice.

1,212 kmMean diameter
0 - shared origin

Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.

A little perspective

The mean diameter of Charon is about 1.51 times 500 miles.

Measurements, assumptions & sources +

500 miles

Length: 804.7 km; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Charon

Mean diameter: 1,212 km; approximate.

Rounded mean-radius model of Charon. The derived area and volume describe a sphere; surface terrain and flattening are omitted.

NASA JPL — Planetary satellite physical parameters

The marked mean diameter is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 500 miles with the mean diameter of Charon. The notes below explain how each value was chosen.

500 miles

804.7 km

Length · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Charon

1,212 km

Mean diameter · approximate

Rounded mean-radius model of Charon. The derived area and volume describe a sphere; surface terrain and flattening are omitted.

Comparing
Length ↔ Mean diameter
Relative size
The mean diameter of Charon is about 1.51 times 500 miles. The mean diameter of Charon is approximately 50.6% greater than 500 miles.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The mean diameter of Charon: This is an estimate; check the notes for its rounding and uncertainty.

This comparison follows the selected length only; other dimensions may differ.

804,670 mmetres
2,640,000 ftfeet
5.3789 × 10⁻⁶ AUastronomical units
8.5054 × 10⁻¹¹ lylight-years

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