Named in honor of Siegfried Röser (1948– ), astronomer at the Astronomisches Rechen-Institut, Heidelberg. Together with U. Bastian {see planet  (2855)}, Röser produced the PPM Star Catalogue. Röser has also contributed to astrometry by re-reducing all the positional data of Halley’s Comet at its 1835/36 and 1909/11 apparitions. (M 20520) _ _.