AMATEUR
ASTRONOMY PAGES
Javier Gómez
Laina
ngc6946 & ngc6939 in Cepheus
Object:
ngc6946 -face-on spiral galaxy- &
ngc6939 -open cluster-
Optics:
TeleVue TV-76 with 1.1x
flattener (f 528mm).
Camera:
Canon 350d modified (infrared filter removing)
Exposures:
27 x 240" ; 1h:48' total exposure
ISO:
800
Date:
2 Oct 2005
Mount:
Home made aluminum fork controled by PicGoto system.
Guiding:
MX716 on 250 f/4.8 Newton
Processing:
ImagesPlus:
Darks, Bias & Flat calibration;
average
combining.
Digital Development Processing (DDP).
Registar:
images aligning
PixInSight:
Dynamic Background Extraction (sky
gradient correction)
PhotoShop:
Curves adjust.
Noise removing with Grain Surgery
Plug-in
Unsharp masking