IC5146, the Cocoon Nebula, is an emission nebula in Cygnus that lies at the end of B168, a large area of dust and hydrogen, not excited from stars. This dark nebula stop the light emitted from stars and nebulae, so probably the Cocoon is much larger than the area normally visible. Embedded into IC5146 is an open cluster containing about 20 stars that have the same catalog number of the Cocoon.
- Exposure : one 40 min. negative scanned with Polaroid Sprintscan 35+ and enhanced with Photoshop 4.0
- Telescope : Takahashi FS-102 at F/6 with focal reducer on a Losmandy G11
- Guiding : ST4 on a Vixen 80/910mm.
- Film : unhypered Kodak Multispeed PJM-2
- Location : Piano di Nivolet (Val d'Aosta) - 2600mt. height
- Date : July 16, 1999