Bubble Nebula - M52 (NGC 7635, NGC 7538)

clic for 50% size 1524 x 1287 (834 kB)

Clic here for a pure H-alpha image in 50% size 1524x1287 (721 kB)


About this Image

NGC 7635, the Bubble Nebula, a nebula that is being shaped by a young hot star in its center is an expanding shell of glowing gas. The shell is being shaped by a very strong stellar wind of material and radiation which is emanating from the bright star. 11,300 light-years from us, the Bubble Nebula lies in the constellation Cassiopeia, an another bright nebula in this field is NGC7538; the open cluster M52 lies in the foreground in 5000 light years distance.
North is down.

Below you see a crop on the center of NGC 7635 at 150% size.
Even below there is a crop on NGC 7538 at 150% size.


Technical Details
Optics

105mm TMB refractor with flattener at f/6.5

Mount MK-100 GEM
Camera SBIG STL-11000M at -25C, internal filter wheel
Filters Astronomik H-alpha (15 nm) + RGB
Date Oct 24, 2004.
Location Wildon/Austria
Sky Conditions mag 5 sky, high transparency, 3/4 moon up, temperature 10 C
Exposure Ha = 240 minutes (15-minute sub-exposures),
RGB= 30:30:30 min (10-minute sub-exposures)
Processing Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus; Noise reduction by Neatimage;
Photoshop: H-alpha blended to red and L channel; cropped;