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Imaging telescope or lens:Planewave CDK24
Imaging camera:FLI Proline 16803
Guiding camera:Starlight Xpress Ultrastar
Integration: 21.0 hours
Flat darks: ~80
Avg. Moon age: 27.00 days
Avg. Moon phase: 12.03%
Mean SQM: 21.00
Astrometry.net job: 2346890
RA center: 1h 19' 45"
DEC center: +3° 21' 39"
Pixel scale: 0.468 arcsec/pixel
Orientation: 179.245 degrees
Field radius: 0.282 degrees
Locations: KG Observatory, Julian, CA, United States
Data source: Backyard
After seeing the amazing NGC 474 published by Lorenzo Siciliano, I couldn't believe what I was seeing. So I decided to alter my November schedule to focus on this one object.
So far, every night has had high wispy clouds. I planned to gather 12 hours of L and 2 hours of each RGB with no clouds. What you see here is only 4.5 hours of L and 2 hours of each RGB all through wispy clouds. I plan to image this object for another week to see if I can get better data. Until then, I hope you enjoy this work in progress.
What a surprise to see another similar "shell" object, NGC 467, in this wider field!
***Reprocessed from additional data captured in clear 21.4 SQM skies on 11/5, 11/6 and 11/7. 10 hours L and approximately 4 hours of each RGB.***
"Scientists have demonstrated through computer modelling that interacting or merging galaxies can produce multiple shells in concentric layers. NGC 474 is a distant elliptical galaxy exhibiting just such an pattern. By chance, a second shell-type galaxy is present in the upper left corner of this field (NGC 467)."
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