Michael A. Stecker


Barnard-168 and Cocoon Nebula
The round Cocoon nebula is seen at the lower left of the image and the long dark nebula B168
is seen extending from it across the image to the right.  The Cocoon is primarily a red emission nebula (Sharpless-125) but does have blue reflection and dark components as well.  Embedded
in the nebula is open cluster IC 5146.
Photographic Data: An Astrophysics 155 mm f/7 EDF refractor and Pentax 6x7 camera  were used with unhypered Kodak Pro 400 PPF-120 film.  Two 45-minute exposures were made centered at RA 21 hrs, 46 min and Declination +48 degrees in Cygnus. The field of view is
3.5 x 2.3 degrees and north is up.  The negatives were stacked, processed, and cropped in
the computer.