Placidus
25-03-2016, 03:54 PM
The top right of this image is from the last week or so, with 8hrs each Ha and SII, and 10 hrs of OIII. The bright star is lambda Centauri.
The bottom left is from a couple years ago, with just 2 hours each (so centre is 10-12 hrs) per channel. You can see the difference in that the bottom left shows artefacts (hot pixels, cosmic rays, etc) which are not present at top right.
The variety of texture in just this little patch is amazing. All the way from sharp shock fronts, strong in SII (the point of the new stuff at top right), via fox-fur nebula-like turbulent stuff, to the generally very smooth OIII, which ends abruptly at the strongest shock front.
Those with sharp eyes will see the up-ended body of a lion, head down, bum up, at the right-hand edge of the top section.
Mostly taken at or near full moon, using 3nM Astrodon filters.
Field is 58 min arc high, North up, 0.55 sec arc/pixel. Aspen CG16M on 20" PlaneWave CDK on MI-750 fork. 32hrs total exposure in 1 hr unbinned subs. All processing as usual using our own GoodLook 64.
Should it ever stop raining, we hope to complete the mosaic, and get some more data at the bottom left, to get rid of those artifacts, but this will have to do for now.
Big one here (www.mikeberthonjones.smugmug.com/Category/Star-Forming-Regions/i-LN2CBNf/0/O/J%20Lambda%20Centauri%2032hrs%20NB% 20mosaic.jpg)
Best,
Mike and Trish
The bottom left is from a couple years ago, with just 2 hours each (so centre is 10-12 hrs) per channel. You can see the difference in that the bottom left shows artefacts (hot pixels, cosmic rays, etc) which are not present at top right.
The variety of texture in just this little patch is amazing. All the way from sharp shock fronts, strong in SII (the point of the new stuff at top right), via fox-fur nebula-like turbulent stuff, to the generally very smooth OIII, which ends abruptly at the strongest shock front.
Those with sharp eyes will see the up-ended body of a lion, head down, bum up, at the right-hand edge of the top section.
Mostly taken at or near full moon, using 3nM Astrodon filters.
Field is 58 min arc high, North up, 0.55 sec arc/pixel. Aspen CG16M on 20" PlaneWave CDK on MI-750 fork. 32hrs total exposure in 1 hr unbinned subs. All processing as usual using our own GoodLook 64.
Should it ever stop raining, we hope to complete the mosaic, and get some more data at the bottom left, to get rid of those artifacts, but this will have to do for now.
Big one here (www.mikeberthonjones.smugmug.com/Category/Star-Forming-Regions/i-LN2CBNf/0/O/J%20Lambda%20Centauri%2032hrs%20NB% 20mosaic.jpg)
Best,
Mike and Trish