Quote:
Originally Posted by foc
Being a beginner SA 100 imager, I am surprised to see a comet image with little C2 but such a bright Sodium line. I am quite keen to see your next version with less moon and hopefully sun noise, and when our difficult weather allows
|
Thanks Ross. As I said earlier, this shows more dust than any bright comet I’ve been lucky enough to obtain a spectrum of, surpassing C/2011 L4 (PANSTARRS). That comet showed bright continuum but also had small C2 peaks rising from the curve. And it had a very bright sodium emission!
Comets come with a full range of dust/gas ratios and some of the gassy ones show very little continuum. The ‘serious’ amateur spectroscopists tend to remove continuum to target emissions and that’s fine, but I’m happy to do the easy yards which just characterise a comet.
Cheers -