Full Resolution Here's another way to look for binaries, or for any shape other than a single, unresolved small body. Tod Lauer has extracted the Point Spread Function (PSF) of Arrokoth, and of a typical star. Stars are always point-sources since they're so far away. Anything resolvable would be larger than a point. And at this point, December 29, there is no measureable difference between Arrokoth (labeled MU69 here) and a star. They're both too tiny to see even the slightest detail.
