Clic here for 50% size 1993x1333 (816 kB)
The California Nebula in Perseus is an extended complex H-II region named to its stately shape.
This nebula resides some 1000 light years away.
The glowing portion of the nebula is around 100 light years in extent, it shows a lot of shock waves shaped from the stellar wind of hot stars.
Clic here for 50% size 1993x1330 (712 kB)
105mm TMB refractor with flattener at f/6.5
About this Image
North is up.
Below you see a pure H-alpha image.
Technical Details
Optics
Mount
MK-100 GEM
Camera
SBIG STL-11000M at -30C, internal filter wheel
Filters
Astronomik RGB + H-alpha (15 nm)
Date
Nov 20, 2004.
Location
Wildon/Austria
Sky Conditions
mag 5.5, temperature 0-5 C,
Exposure
Ha = 240 minutes (15-minute sub-exposures),
R:G:B = 30:30:30 (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: color balance; H-alpha blended to red and as L channel;