Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 7789
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NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates
NGC 7789 Open Star Cluster in Cassiopeia (with Ha)
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NGC 7789 Open Star Cluster in Cassiopeia (with Ha)

Getting plate-solving status, please wait...
NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates
NGC 7789 Open Star Cluster in Cassiopeia (with Ha)
Powered byPixInsight

NGC 7789 Open Star Cluster in Cassiopeia (with Ha)

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 · Ha 5nm
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:
Aug. 31, 2017
Frames:
Blue: 26x60" (26') bin 1x1
Green: 20x60" (20') bin 1x1
Ha 5nm: 24x1800" (12h) bin 1x1
Red: 23x60" (23') bin 1x1
Integration:
13h 9'
Avg. Moon age:
9.31 days
Avg. Moon phase:
69.89%
Mean SQM:
18.50

Basic astrometry details

Astrometry.net job: 1832975

RA center: 23h57m24s.10

DEC center: +56°4138

Pixel scale: 1.435 arcsec/pixel

Orientation: 0.130 degrees

Field radius: 0.876 degrees

Resolution: 3364x2828

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard

Description

A view of this cluster like you have never seen before. This is a basic RGB image taken in about an hour. Then another 12 hours of Ha data taken as 24 x 1800s subs bin 1x1. The Ha is then added as a tonemap, (i.e. stars removed)

This Ha nebula is Very faint and still needs lots of processing to bring it out.

This is second such open cluster I have finished that shows faint Ha in the frame, the first one being M39.

Version C has better contrast and more saturation. After uploading the previous version, I was aware that it looked rather flat compared to the version on my PC

Comments

Revisions

  • NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates
    Original
  • NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates
    B
  • Final
    NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates
    C

Sky plot

Sky plot

Histogram

NGC 7789 Open Star Cluster in Cassiopeia (with Ha), 



    
        

            Mike Oates