Hello everyone! I established a Skygems account only recently, and just came across this small Comet Leonard data set from late December. Here's my result, which is based on averaging three 120-s luminance images, and coloring that mean with an RGB frame made from a single 120-s image from each of the red, green and blue channels. With these selection choices, I restricted the airmass of the employed data to about 2.6 or so. To calibrate the data, I downloaded 20-30 raw bias, dark and flat frame images that were taken as close as possible to the observation date, and made my own mean frames with CCDStack. Subsequent processing was done in Photoshop CC. I appreciate this opportunity - it's the first time I've processed a comet image!