The rotation and coma profiles of comet C/2004 Q2 (Machholz) M. Reyniers, P. Degroote, D. Bodewits, J. Cuypers and C. Waelkens A&A, 494 1 (2009) 379-389 Published online: 22 December 2008 DOI: 10.1051/0004-6361:20079225