Recently Browsing 0 members
No registered users viewing this page.
NGC281 - The Pac-Man by Chris Kennedy, on Flickr
35kph gusts of wind, and REALLY bad guiding due to a lack of drift align and the star being "blown away", but managed to get a little something out of 30x360s light frames, also a new target for me, one I want to come back to under better conditions and with other wavelengths of light to make a full colour image.
While I am waiting for enough astrodark to make it worth while up here, I have revisited my Pacman nebula data from November last year, since I had the feeling that there were more nebulosity there to bring out. Most Pacmans I have seen posted on the web are processed quite hard and only bring out the central parts - maybe to emphasize the Pacman figure. However, I just saw a Ha image of Pacman at Astrobin that reveals a lot of surrounding Ha-nebulosity, particularly to the right of the nebula (http://www.astrobin.com/full/144610/0/).
So here is my revised version showing more of that surrounding nebulosity. Below it I post my old version for comparison.
Processed in PS CS5 now also using the APF-R technique (http://www.cedic.at/apfr/) to bring out more faint stuff and a round of Hi-pass filtering to bring out more structure in the nebulosity.
Equipment: ES 127EDapo with a Canon 60Da on an EQ8
29 x 360 sec, so totally about 3 hours.
Any comments and suggestions most welcome - I am sure it can be improved
No clear nights in sight to keep me awake so great re-processing weather over here in Sweden! This is data from end of November. About 3 h (29 x 6 min) of the Pacman taken with my 5" ES apo and Canon 60Da at ISO 1600, so pure RGB.
Comments and critique most welcome of course
The Pacman Nebula in Cassiopeia (NGC 281). Captured with APT, Canon DSLR, Baader coma corrector, Hα filter, .25m f/4 reflector, at ISO800, 19x600sec exposures. Guided with PHD2, finderscope, Atik16ic. Registered and stacked in Iris, processed in PixInsight, no calibration frames. The last 5 exposures were taken in a sky with no naked-eye stars visible (due to thickening high cloud) and the first 6 were badly focused! So definitely a session to learn from...
Well its been a long time coming but I have managed to get back into the obsy and start imaging again. :-)
I was very rusty setting up and my tracking started off good and then started to fail as the target was straight overhead.
Anyway without much ado - Here is the result - Just 3 x 10 min subs (The rest got scrapped to the poor tracking) with a bit of pixel bodging in PI
MN190, QSI683 with Astrodon 3nm Ha