Is comet C/2012 S1 Ison fading? (25 Nov. 2013)
While comet C/2012 S1 Ison is living its “hottest” days, approaching the minimum distance from the Sun (28 Nov. 2013), a report from Michal Drahus (Caltech/NRAO) says that he and Israel Hermelo (IRAM Granada) have been studying the comet with the IRAM millimeter telescope in Spain, finding that in the last few days the the molecular emission dropped at least of a factor of 20, suggesting the comet is now basically not emitting or no longer existing.
Optical/visual reports by several observers over the last 36 hours suggested a fading phase, too.
On the other side, observations from space via Nasa’s STEREO spacecraft still show the comet there, at least with its dust:
Further observations are needed to understand what is happening there: the evolution of the dusty counterpart is STEREO will be important for this, too.
Support The Virtual Telescope Project!
If everyone reading this right now would donate something, our fundraiser would be done in a few days. Please, donate and receive unique, LIMITED EDITION set of images showing the stunning 19 Feb. 2019 Supermoon above Rome, images of the Tiangong 1 and International Space Station above Rome and more, specifically made for supporters like you!
donate now (you can adjust the amount later)