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Contains:  NGC 7320, NGC 7319, NGC 7318, Stephan's Quintet, NGC 7317
Getting plate-solving status, please wait...

ARP319 - Stephan's Quintet

Technical card

Resolution: 2727x2067

Dates:Oct. 2, 2016Oct. 3, 2016Oct. 4, 2016Oct. 6, 2016Oct. 7, 2016Oct. 8, 2016Oct. 9, 2016

Blue: 25x180" -20C bin 1x1
Green: 25x180" -20C bin 1x1
Luminance: 181x180" -20C bin 1x1
Red: 25x180" -20C bin 1x1

Integration: 12.8 hours

Darks: ~50

Flats: ~50

Bias: ~256

Avg. Moon age: 4.57 days

Avg. Moon phase: 24.84%

Bortle Dark-Sky Scale: 5.00 job: 1287040

RA center: 22h 36' 1"

DEC center: +33° 57' 25"

Orientation: -92.104 degrees

Field radius: 0.251


Moving along to a more commonly imaged object, this target has become somewhat of a benchmark of mine. This is actually my fourth attempt at it. The first two are absolutely not worth posting. My third attempt with a DSLR can be seen here.

... and finally I got around to trying it with my current setup. There is no doubt that this is my best interpretation of the target, but feel I still have quite a number of possible improvements. I won't do a detailed write-up on this one since most readers know what's going on here (or is a short Wikipedia visit away).

One of the things that I struggled with here was that there is faint IFN throughout the area. It's hard to process the undulating background without making it look like an accident. In the end I just chose to keep the background low and display the galaxies and not focus on the depth of the integration. My light pollution situation makes a clean interpretation of the IFN difficult anyway.




Jason Guenzel
License: None (All rights reserved)

Sky plot

Sky plot


ARP319 - Stephan's Quintet, 


            Jason Guenzel