IC5146 - Cocoon Nebula (5 votes)  
Cygnus

Reflection, emision and absorption nebula
 
 
Awards & publications:
Published in AstronomiA magazine, No.117 Mar. 2009
 
 
The Cocoon Nebula is a small round nebula centered near the apex of several dark lanes in the otherwise rich star fields of Cygnus. It floats within a sea of dark clouds and huge amount of stars. It is a star forming region, embedded in an open cluster of about 80 young stars, and contains emission, reflection and absorption nebulas. The large central star within the Cocoon has blown a hole in the nebula gas and is likely responsible for exciting the surrounding hydrogen to emit in Ha light.

IC 5146, also Caldwell 19 and the Cocoon Nebula, is located near the naked-eye star Pi Cygni, the open cluster NGC7209 in Lacerta, and the bright open cluster M39.

The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across.
 
 
Technical details:  
Location:  
Soria - Spain
Date:  
Jul 28, 2008
Conditions:  
Very good
Temperature:  
13ºC
Humidity:  
low
 
Telescope:  
Meade Reflector 150 f/5
Reducer/corrector:  
Baader MPCC
Filter:  
IDAS LPS 2"
Mount:  
Vixen GPD2 Autostar Meade
Camera:  
Canon 350D no filter
Exposure:  
4x900s@400ISO
Guiding tube:  
B&C 60/350 f7
Guiding camera:  
Meade DSI Pro
Guiding software:  
K3CCDTools
 
Procesing:  
PixInsight LE.  
Notes:  
Esta imagen fue publicada en la sección "Astrofotografía" de la revista Astronomía No.117 de marzo 2009.  
   
   
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Votes received / Votos recibidos: 5  
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