Spectrum Of Comet ISON
Taken by Chris Schur on October 12, 2013 @ Payson, Az
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Date Taken: 2013:10:12 15:36:09
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Trying to get a spectrum of this very faint comet is a challenge! The comet was only barely visible in my 12.5 newtonian with a wide field eyepiece at our location in northern Arizona at 5000 feet. Clarity was excellent. Here I have made a mosaic of todays observations for you to ponder. The background image is a 15 minute color image of the comet with the 12.5 and an ST10XME CCD. The faint green coloration in the front of the head can be seen here. On the bottom left is a shot of the field with a Star Analyzer grating to produce slit less spectra of the entire field. Reducing the data in Rspec, the plot on the right was produced. The peaks (and a lot of noise) show C2 emissions in the greens and blues. That is the reason for ISONS color.
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Very interesting Chris, and we will be careful even if it produces a sodium tail like Hale-Bopp. Do you remember?
Posted by astromazzo 2013-10-13 01:22:17
You can see a picture here: http://www2.jpl.nasa.gov/comet/candy22.html

Posted by astromazzo 2013-10-13 10:42:32
19 thumbs up
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