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Contains:  M 104, M104, NGC 4594, Sombrero Galaxy, Sombrero galaxy
Getting plate-solving status, please wait...
Sombrero Uncovered?, 



    
        

            KuriousGeorge
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Sombrero Uncovered?

Technical card


Dates:May 15, 2020May 16, 2020May 24, 2020

Frames:
Astrodon 50 mm G: 4x900" -30C bin 1x1
Astrodon 50mm B: 4x900" -30C bin 1x1
Astrodon 50mm L: 4x1800" -30C bin 1x1
Astrodon 50mm R: 4x900" -30C bin 1x1

Integration: 5.0 hours

Darks: ~40

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 16.18 days

Avg. Moon phase: 25.43%

Mean SQM: 21.50

Mean FWHM: 2.00


Astrometry.net job: 3589079

RA center: 12h 39' 59"

DEC center: -11° 37' 35"

Pixel scale: 0.468 arcsec/pixel

Orientation: 1.928 degrees

Field radius: 0.130 degrees


Resolution: 1643x1151

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

Just a final Sombrero teaser before I move on. (-:

This used four of the lowest FWHM 30 minute subs (2 hours) from my prior project (1.95 to 2.16"). But the aspect ratio on these subs varied between 8 and 14%, so stars are not as round as I'd like. Altitude for all 4 subs was around 44 degrees.

I turned down the midrange brightness a bit more than we typically see to expose more of the central area, but still maintain a "smooth" feel.

Two deconvolution levels were used. A lighter one for the background to minimize rings and a stronger one for the bright galaxy where rings don't form.

Something a little different I suppose?

4L @ 1800s. 4R, 4G, 4B @ 900s.

Comments

Author

KuriousGeorge
KuriousGeorge
License: None (All rights reserved)
4399
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Revisions

  • Sombrero Uncovered?, 



    
        

            KuriousGeorge
    Original
  • Final
    Sombrero Uncovered?, 



    
        

            KuriousGeorge
    B

B

Description: Added a slight masked sharpening for those that prefer a more "in-focus" version. (-:

Sky plot

Sky plot

Histogram

Sombrero Uncovered?, 



    
        

            KuriousGeorge