What is the diameter, approximately, of the asteroid 55 Pandora?

The asteroid 55 Pandora has an approximate diameter of 80 kilometers.

55 Pandora is a main-belt asteroid discovered by George Mary Searle in 1858. It orbits the Sun between Mars and Jupiter and is classified as a stony S-type asteroid. Its name comes from Pandora of Greek mythology, following a long tradition of naming minor planets after mythological figures.

Asteroid sizes are often estimates rather than single perfectly measured values. Irregular shapes, changing viewing angles, and different observation methods can produce slightly different dimensions. For that reason, reference works commonly give 55 Pandora’s diameter as approximately 80 kilometers rather than implying a flawless spherical measurement.

This object is separate from Saturn’s moon Pandora. The asteroid is designated by the number 55 because it was the fifty-fifth minor planet to receive a permanent numbered designation, while Saturn’s moon is identified within the planet’s satellite system. Shared mythological names can therefore describe entirely different astronomical bodies.