This is a reprocess of some earlier data of the Horsehead Nebula in Ha. I managed to grab an additional five subs. The additional subs have really helped to tame the noise in the darker parts. It seems that we just don’t have the luxury of re-imaging with our weather in Melbourne, so I have cropped to reduce the effects of that crazy bright star to the left. On the plus side, I can see a few more subtle details appearing in the goatee area of the space dragon. Or was that horse?
Thank you for your comments Marcus, Mike and Allan.
Marcus, the details. The total time was 7.8 hours. Imaged 15 km from Melbourne CBD, in the red zone according to those light pollution maps. Narrowband imaging is all I can do from here, and gradients are definitely an issue.
6 subs at 20 min 1X1 binning.
10 subs at 35 min 1X1 binning.
Camera: STL-11000m running at -15 / Scope: 10” RC f9 / Mount: AP-900 / Baader Ha Filter 7 nm
Data calibrated and stacked with CCDStack, and processed with Photoshop 6.
Mike, your memory serves you well. I did use an STL-11000 on a 10” RC. I think I have enough data for now unless we magically get some cloud free weather here that allows a total reimaging of the target with another orientation to avoid that bright star. I’m sure you appreciate just how difficult getting a suitable guide star that allows your preferred framing can be at times. That FOV in the guide chip is small.
Thanks Rod, Marc, and Mike. It’s always great to get back some feedback regarding the detail within. Even without mega data, we can get lucky and capture some reasonable images to show our wife’s.
Terry
Ross, Rob, Geoff. Thank you for the nice feedback. As good as it gets comments do make the effort worth it in the end. I remember looking at this object in text books as a kid. Taken with the big guns of scopes in the day. But today, we can grab some amazing pics with modest apertures and a bit of tech thrown in. Definitely cool.
