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Scope: ST80 f/2.5; Location: Del Mar CA; 6 Mar. 2004; Camera: ToUcam SC3
Exposure: 20 x 8 sec Luminance with Baader IR Block and Orion Skyglo Filters; 15 x 8 sec RGB - 4 frame mosaic
Processing: All exposures captured in K3CCDTools. Alignment and stacking was done with Registax and saved as FITs. Each exposure set after stacking was co-registered in Astroart. Artificial flat fielding of each channel was done in
Astroart as well as final scaling and rough color balance. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Color balance and mosaic joining was done in Photoshop. I also experimented a little with a Maximum Filter to try to highlight the star cascade in a fairly busy star field.
This image was inspired by my desire to capture the full star "cascade" of Kemble's Cascade. You can see the star cascade starting in the upper right and ending in the lower left with the open cluster NGC 1502. The exposures themselves were unguided and there was no difficulty with tracking given the relatively large FOV and short exposures. A closer view of N GC1502 is also seen on this
page below. Horizontal FOV is about 160'.
NGC 1502 Cluster
Scope: C8 f/5; Location: Del Mar CA; 7 Mar. 2004; Camera: ToUcam SC3
Exposure: 12 x 40 sec, 12 x 15 sec, and 12 x 5 sec Luminance exposures with Baader IR Block and Orion Skyglo Filters; 12 x 12 sec RGB
Processing: All exposures captured in K3CCDTools. Alignment and stacking was done with Registax and
saved as FITs. LRGB channels were co-registered in Astroart. Artificial flat fielding of each channel
was done in Astroart as well as final scaling and rough color balance. The two
Luminance exposures were combined in Photoshop to reduce bloat on the central
stars. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Color balance was done in Photoshop.
This image is of the star cluster at the end of Kemble's cascade and can be seen in the lower left of
the wide field image above. This is a guided image. This image replaces an earlier image which can be
seen in the Archives
Here. Horizontal FOV is about 16'.
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