Singer Brewster is a periodic comet in our solar system. Its name is unusual: co-discovered comets bear the names of the co-discoverers linked by hyphens (e.g. Shoemaker-Levy 9, Swift-Tuttle, etc.). But the single discoverer in this case bears a hyphenated name (Stephen Singer-Brewster), so the comet's name replaces the hyphen by a space. It was discovered in 1986, and received the name of 1986d under the old naming system.