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Contains:  NGC 906, NGC 898, NGC 891
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NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM

NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM

Technical card

Resolution: 4503x3384

Dates:Dec. 14, 2017

Frames: 300x60"

Integration: 5.0 hours

Avg. Moon age: 26.12 days

Avg. Moon phase: 12.57%

Astrometry.net job: 1974804

RA center: 35.722 degrees

DEC center: 42.495 degrees

Pixel scale: 0.912 arcsec/pixel

Orientation: 284.043 degrees

Field radius: 0.713 degrees

Locations: Home Observatory, Wake Forest, NC, United States

Data source: Backyard

Description

I took these frames around mid-December 2017. I shot 500 L's and 100 each of R, G and B. Clouds interfered with about 150 of the L's, and when I integrated the remaining L's, I didn't think the result was as good as a synthetic L extracted from the RGB integration, so I used that instead.

What I like about this image: nice range of star colors, the dust lanes in NGC 891, and quite a few interesting smaller galaxies - I count about 20.

Improvements needed: stars a bit oblong if you pixel peep (probably guiding), background a bit mottled (need more data to smooth it out).

Overall, I'm glad I can get enough LRGB data from my front-yard pier to make LRGB imaging fun! Local skies measure 19.77 SQM with my iPhone app.

Comments and critiques always welcome!

Rowladn

Comments

Author

Vassar1976
Rowland Archer
License: None (All rights reserved)
1150
Like

Revisions

  • NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
    Original
  • NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
    B
  • Final
    NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
    C

B

Prior to ON1 filter

C

Lightened with Curves

Sky plot

Sky plot

Histogram

NGC 891 Outer Limits Galaxy - LRGB - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer

In these public groups

ZWO ASI1600MM/QHY163M