Has it disintegrated! "Hi All, Comet ISON has been closely monitored at the IRAM millimeter telescope in Spain by Israel Hermelo (IRAM Granada) and myself (Caltech/NRAO) for the last 6 days. We observe consistent, rapid fading of the molecular emission lines between Nov. 21 and Nov. 25 by at least a factor of 20 (likely more). This may indicate that the nucleus is now at best marginally active or that... it no longer exists. Regards, Michal" http://groups.yahoo.com/neo/groups/comets-ml/conversations/topics/22461