Mini moon: Nasa spacecraft discovers asteroid orbited by its own tiny satellite

This photo provided by Nasa was taken by the Lucy spacecraft during Wednesday’s flyby of asteroid Dinkinesh, 300m miles from Earth. Photograph: AP

You could call it a “mini moon”.

In one of the smallest, but still exciting, discoveries by Nasa in recent years, a spacecraft visiting a minor asteroid way out in the solar system has discovered that the chunk of space rock has its own tiny sidekick.