Comet C/2014 Q2 (Lovejoy) on Jan-20, 2015
0.20x resized, original image scale ~4.6\arcsec /pixel
Visual observation: m1 = 4.1 thru naked eye.
Calibrated with dark, bias and flat-field frames in IRIS, registered and stacked on the comet's motion in IRIS. Further processed in Fitswork and Photoshop.
The humidity was very high, and the weather deteriorated with more and more clouds during imaging the comet.