California Nebula (NGC 1499)

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About this Image

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.
North is up.
Below you see a pure H-alpha image.

clic for 30% size 1196 x 798 (314 kB)

Clic here for 50% size 1993x1330 (712 kB)

Technical Details


105mm TMB refractor with flattener at f/6.5

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;