English: Comet C/2013 US10 Catalina in Virgo constellation just before dawn of 09 Dec 2015. One can clearly see its two tails. The first one (upper left corner) is a narrow gaseous tail directed against the sun by the solar wind. The second one (lower right corner) is a widespread dust tail aimed along the comet's orbit. Image shot from Karabi-Yaila (1000m above sea level), Crimea, Russia. Shot with Canon 600D DSLR mounted on Celestron 8" SCT with focal reducer (focal length 1280mm) on Celestron AVX mount with NexGuide autoguide on 80mm Guidescope. Stack of 5 single exposures 5 minutes each (calibrated by bias, dark and flat frames). Processed in PixInsight+Photoshop.