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Contains:  NGC 474, NGC 470, NGC 467
Getting plate-solving status, please wait...

NGC 467, 470 and 474

Technical card

Resolution: 3450x2739

Dates:Nov. 1, 2018Nov. 5, 2018Nov. 6, 2018Nov. 7, 2018

Frames:
Astrodon 50 mm G: 13x900" -20C bin 1x1
Astrodon 50mm B: 16x900" -20C bin 1x1
Astrodon 50mm L: 40x900" -20C bin 1x1
Astrodon 50mm R: 15x900" -20C bin 1x1

Integration: 21.0 hours

Darks: ~20

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 27.00 days

Avg. Moon phase: 12.03%

Mean SQM: 21.00

Astrometry.net job: 2358080

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

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)."

Comments

Author

KuriousGeorge
KuriousGeorge
Like

Revisions

B

Decreased red saturation a bit.

C

Reprocessed from additional data captured in clear 21.4 SQM skies. 10 hours L and approximately 4 hours of each RGB.

Histogram

NGC 467, 470 and 474, 





    
        

            KuriousGeorge