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ACO 1656 in the Coma Cluster, 



    
        

            Mike Oates
ACO 1656 in the Coma Cluster
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ACO 1656 in the Coma Cluster

Getting plate-solving status, please wait...
ACO 1656 in the Coma Cluster, 



    
        

            Mike Oates
ACO 1656 in the Coma Cluster
Powered byPixInsight

ACO 1656 in the Coma Cluster

Equipment

Imaging Telescopes Or Lenses
Takahashi FSQ-106 ED
Imaging Cameras
Starlight Xpress SX-814 Trius Monochrome CCD
Mounts
Sky-Watcher AZ-EQ6 GT
Filters
Red · Green · Blue · Astrodon L-NIR
Accessories
Lakeside Astro Motor Focus System · Starlight Xpress SX 'Maxi wheel' · Starlight Instruments FTF3545B-A Focuser
Software
Sequence Generator Pro · PIXINSIGHT 1.8 · Photoshop CS6
Guiding Cameras
Starlight-XPress Lodestar Autoguider

Acquisition details

Dates:
March 13, 2016
Frames:
Astrodon L-NIR: 46x1865" (23h 49' 50") bin 1x1
Blue: 52x453" (6h 32' 36") bin 1x1
Green: 54x369" (5h 32' 6") bin 1x1
Red: 57x363" (5h 44' 51") bin 1x1
Integration:
41h 39' 23"
Avg. Moon age:
5.03 days
Avg. Moon phase:
26.01%
Mean SQM:
18.60

Basic astrometry details

Astrometry.net job: 1545443

RA center: 12h59m51s.8

DEC center: +27°5331

Pixel scale: 0.718 arcsec/pixel

Orientation: 0.012 degrees

Field radius: 0.819 degrees

Resolution: 6382x5166

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard

Description

ACO 1656 in the Coma Cluster is a great place to see how many galaxies you can capture in one image. I have counted over 3000 in this image which is incredible when you consider where it was taken from. Note: I counted by dividing the image up into 100 segments and counting galaxies I could see in 10 of those segments at random and multiplying by 10.

Most of the exposures were taken with an Astrodon NIR filter (Near Infra Red), this allows me to take quite long subs, (30min) and is a great way of going deep when imaging galaxies as you can reach those that have red shifted a bit as well. NIR tolerates light polluted skies, but I tend to not image in NIR during periods of bright Moon light.

Mixed exposures were used and are shown as the average sub length for each filter. Taken between Jan 2015 and March 2016 on 20 nights.

For those people who saw this image during a lecture I gave to the Manchester Astronomical Society in Feb this year, this is a completely re-processed image right back to calibration as I was not happy with the first result.

Comments

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Histogram

ACO 1656 in the Coma Cluster, 



    
        

            Mike Oates