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Go long enough on the
Cocoon Nebula (IC5146) and the long dark lane known as Barnard
168 becomes a golden colored bright molecular cloud. On the right
side, this dark streak terminates in a dark non illuminated mass
of dust and gas shaped like a tangled shoelace. The Cocoon is
an example of a Stromgren sphere, an exitation distance limited
nebula near a hot blue star. Also note that the Cocoon has two
red wings on each side, something that is difficult to capture
without dark skies and longer exposures.
Technical Data: 8"
f/2 RASA astrograph, ASI2600mc + IDAS NBZ2
Integration time = 2h total, Happy Jack, Az.
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