Graphic by NASA JPL Small-Body Database Browser
23rd. of Dec.2015; Sudelfeld, South Bavaria (Brightness apprx. 5,6 mag*)
Newton 900mm f4.5, 3x55sec, ASA 1600, Canon 5DM3
13th of Dec.2015; Auerberg near Schongau, South Bavaria (Brightness apprx. 5,7 mag*)
Newton 900mm f4.5, 3x70sec, ASA 1600, Canon 5DM3
*mag = > light magnitude: Up to mag +3-4 stars are visible nearby cities with the naked eye, in very dark areas the seeing limit can reach up to mag +6-7.
The more higher numerical value is given, the more weaker are the objects. E.g. - 4,7 mag, Venus glittering; - 1,0 Sirius, brightest star; +3,5 M31 Andromeda, pale shiny oval)
All comet observations from 2001 up to now ..