NGC7635 (Bubble Nebula) + M52 - Ha  
Cassiopeia

Emission nebula in Ha.		  
 
It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, the 15 ± 5 M☉SAO 20575 (BD+60 2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.

With an 8 or 10 inch telescope, the nebula is visible as an extremely faint and large shell around the star. The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision. Using a 16 to 18 inch scope, one can see that the faint nebula is irregular, being elongated in the north south direction.		  
 
Technical details:  
Location:  
 Valdemorillo - Spain
Date:  
 13/09/2008 (dd/mm/yyyy)
Conditions:  
 Normal
Temperature:  
 10ºC
Humidity:  
 low
 
Telescope:  
 GSO Reflector 200mm f/4
Reducer/corrector:  
 Baader MPCC
Filter:  
 Baader Ha 7nm 2"
Mount:  
 Vixen GPD2 Autostar Meade
Camera:  
 Canon 350D no filter
Exposure:  
 13x600s@800iso
Guiding tube:  
 B&C 60/350 f7
Guiding camera:  
 Meade DSI Pro
Guiding software:  
 K3CCDTools
 
Procesing:  
  
Notes:  
 Full Moon.  
     

 
All Contents Copyright by Jaime Fernández and Copyright of their respectives owners. Text mainly extracted from Wikipedia.
All Jaime Fernandez propietary contents freely available for non-profit purposes,
otherwise I beg you for a fair contribution to NGO Medicos Sin Fronteras proportional to the profit obtained.

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