Comet C/2012 S1 ISON
Observations started at 7th of November 2013
7. November 2013
First Images, Sudelfeld, Bavarian Alps
Image 1; 8" Newton, f4,5, 6x125s, ASA800, Canon EOS 50D; Aligned toward the coma
Image2; 2x125sec, Aligned toward the stars
Now you can see ISON through a binocular. But it was a hard fight against the November fog. The Brightness is estimated from me to mag 7,5 -8,0
Fear!! A foggy bank was dawdling 300m before my observation point up and down. But an evocation dance around the fisheye objective is helpfull. The photo was already made during the PanSTARRS observations while enjoying the same situation.
ISON from Mt.Etna
22nd of November 5.30 UT
The comet could be seen hardly with the naked eye. In the upper photo it is positioned above the city of Giarre at the base of Mt.Etna. Without telescope and guiding it was a compromise and we could only photograph with short exposure times by using ASA 1600.
Credit to NASA, more at
While approaching the nearest point to the sun, ISON was fading totally and appeared again bright for a hours and calmed down to zero a second time. It is sure that this behavior was the end of an bright comet observation
*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 ..