by Anura Guruge
Click to ENLARGE. BIG image. Images of Comet ISON obtained using the Gemini Multi-Object Spectrograph at Gemini North on February 4, March 4, April 3, and May 4, 2013 (left to right, respectively; Comet ISON at center in all images).
Where C/2012 S1 was on May 4, 2013 per JPL/NASA orbital diagram. Click to ENLARGE. It is still within the asteroid belt.
Link to the Gemini Observatory write-up of the photographs and their analysis.