What is being measured?
Twice JPL’s 24622 km volumetric mean radius. This equivalent-volume diameter differs from equatorial and polar diameters.
Use the named object, variant and dimension. A manufactured or natural object can differ from this reference.
- Dimension
- volumetric mean diameter
- Reference value
- 49244 km
- Evidence
- Published reference measurement
- In metres
- 49244000 m
- Variant
- Equivalent-volume spherical reference
Put the length in perspective
One Neptune — mean diameter represents approximately 575,000,000 card lengths measured end to end. This is a length ratio; it does not calculate how the objects pack or fit.
Neptune — mean diameter · 49244000 m
Metre · 1 m · too small to see
Foot (international) · 0.3048 m · too small to see