January 8, 2003.
My first attempt at the Horsehead, using the DA-1 controller and some experimantal GOTO
software I had written for that controller. The camera was the SC1. Here is what I wrote in an email at the time:
"After working with programming of goto capability for my new controller and
motors the last couple of weeks, I was very eager to test if it worked "for
real", and yesterday and today was the first proper tests. I am very happy
to report that it does indeed work as expected after correcting some sign
errors :-) I have been "jumping around" between bright stars in Orion
tonight, even though the temperature dropped _again_ to -15C and the sky
became very milky due to the "frost smoke" as we call it here.
Goto from Zeta Tauri to Alpha Orionis (Betelgeuse) to Zeta Orionis (Alnitak)
was a joy, and from there it was a small hop to the multiple binary Sigma
Orionis, which I imaged (3 sec exposures Vesta 675K SC, C8/f3). Then the
"clou of the evening" was supposed to be the Horsehead. I used the Goto, but
had no idea if it was pointing in the right direction when it stopped, so I
simply shot some 30 sec exposures just for reference. After some closer
studies, it turns out it was indeed pointing right, but there was no chance
of seeing anything under these conditions, so I have helped the image with
some unconventional postprocessing. It is actually spot on :-)"
Peter Katreniak commented on this and asked me to do some heavy stretching. It gave me a surprise, and I told him:
"Based on your input, I just gave my 30x30sec capture a second processing
attempt in your excellent K3CCDTools. This time I really abused the
histogram. Guess what: THE HORSEHEAD IS THERE!!!! :-))) See the image! I
gave it some gaussian blur + size reduction in Photoshop in order to reduce
the bad pattern effect."
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