Portion of the North American Nebula
Emission nebula in Cygnus
1,600 lightyears away
WO Megrez 90 with f 6.3 reducer, Meade DSI PRO2, guided DSIC 10" LX200 GPS
taken on 10/21/06
Ha(red): 7 x 2mins, SII(Blue): 6 x 2 min, OIII(green): 7 x 2 mins
Standard calibration: Flat field and dark frame subtraction, image stacking and alignment
with AIP4WIN
Image processing with PS CS2