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The Cocoon Nebula
Tri-color on Technical Pan film - 16" f/4.5 Newtonian telescope
- This beautiful emission nebula is entangled with star cluster IC 5146 - a cluster of stars which shine at magnitude +10.0. It is located near the naked-eye star Pi Cygni and the bright open cluster M39. The cocoon is about 4,000 ly away and the central star that lights it formed only about 100,000 years ago. The nebula is about 12 arc minutes across, which is equivalent to 15 light years.
Dark nebulocity (Barnard 168) forms the dark regions that appear starless surrounding the Cocoon.
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