Bubble Nebula NGC 7635 (8 inch w/coma corrector)                  Click on photo to return to 'Diffuse Nebulae'                          Home
 Bubble Nebula            NGC 7635

Other description: Nebula low brightness.
Constellation:  Cassiopeia
Dreyer description: Very faint, 8th magnitude star involved little excentric.
RA: 23h 20m 42.0s  Dec: +61°12'00"  (Epoch 2000)
Always above horizon.  Transit: 01:15
Size:15.0'


I used the 'Minimum' filter to yield this view of the Bubble.
It reduces the stars and enhances the subtleties of the Nebula structure, I think it is very striking.

Photo Specifications:

      TELESCOPE:  8" Newtonian  with coma corrector , F/5.18.....( designed and made by myself )
            CAMERA:  'SBIG' ST-8XE & CFW8 color filter wheel
CAMERA TEMP:  Temp. = -18 C
                   DATE:  09/07/07

Filter
Total
Exposure  time
Sub-frame
 Exposure time
Number  of Sub-frames
Binning
Luminance
30 min
600 sec
3
1x1
Red
30 min
600 sec
3
1x1
Green
30 min
600 sec
3
1x1
Blue
48 min
960 sec
3
1x1
Other









Processing;  Maxim align, combine, curves, stretch, color combine, unsharp mask, mild DDP.