(Earlier, Robert Hooke had identified the comet of 1664 with that of 1618, while Giovanni Domenico Cassini had suspected the identity of the comets of 1577, 1665, and 1680.
(Ešte predtým Robert Hooke stotožnil kométu z roku 1664 s ďalšou z roku 1618 a Jean-Dominique Cassini vyslovil podozrenie o totožnosti komét z rokov 1577, 1665 a 1680.