Pietrabbondante August 2, 2010 .. waiting for the camera ....
there are nights when nothing works, August 2 was one of these, the three seemed to be going rather well ... everything seemed ... the problem has become evident until late evening. In selecting the object of the database recovery has helped me del'agenda Drioli, I selected a planetary nebula and bright enough that they can be taken from the webcam sc1 refurbishing for driving operations. NGC6543 (cat's eye)
0.4 'x 0.3' magnitude 8.30
webcam spc900nc sc1
focus on the sw130/900
heq5messa focus occhiometrica
light frames 93 x 15 / 2 (sigma clip)
20 dark (Median)
Acquisition with GuideMaster
preprocessing and stacking with Iris
processing with PS iris
Below is a raw:
at the end of the evening I tried to resume a globular cluster, and this is the problem of fire become apparent, not the sensor is clearly not perpendicular to the optical axis. Diagnosing the next day it was detached the camera from its case ...
However, although the result seems in line with much of what you see online, are not very happy with the result the central star is a beacon, is much too large and the structure of the nebula are significantly improved.
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