The HCN molecule as a tracer of the nucleus rotation of comet 73P-C/Schwassmann-Wachmann 3 M. Drahus, M. Küppers, C. Jarchow, L. Paganini, P. Hartogh and G. L. Villanueva A&A, 510 (2010) A55 Published online: 09 February 2010 DOI: 10.1051/0004-6361/20078882