2421 20160701171705.0 ASTROimport-578 Pauwels, T. 1992 The importance of guiding on the motion of a comet in astrometric observations In this paper we discuss the influence of guiding on the motion of a comet on the derived astrometric position. Asteroids, Comets, Meteors 1991 1992 http://esoads.eso.org/abs/1992acm..proc..451P published in NONREF