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Contains:  NGC 6140
Getting plate-solving status, please wait...
The challenging NGC 6140, 





    
        

            KuriousGeorge
The challenging NGC 6140

The challenging NGC 6140

Technical card

Resolution: 3492x2922

Dates:June 3, 2019June 4, 2019June 5, 2019June 6, 2019

Frames:
Astrodon 50 mm G: 7x900" -30C bin 1x1
Astrodon 50mm B: 10x900" -30C bin 1x1
Astrodon 50mm L: 39x900" -30C bin 1x1
Astrodon 50mm R: 10x900" -30C bin 1x1

Integration: 16.5 hours

Darks: ~20

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 1.69 days

Avg. Moon phase: 4.71%

Bortle Dark-Sky Scale: 1.00

Mean SQM: 21.60

Astrometry.net job: 2738731

RA center: 245.248 degrees

DEC center: 65.374 degrees

Pixel scale: 0.468 arcsec/pixel

Orientation: 359.480 degrees

Field radius: 0.296 degrees

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

As some of you may know, the very faint NGC 6140 is rarely imaged.

There's only a handfull of these images on Astrobin. Colin McGill's 29.0 hour exposure is very well done on an 8" RC...

NGC 6140 by Colin McGill

Mark Hanson's image using similar equipment was my main reference for this project...

NGC 6140 by Mark Hanson

The image shown here was captured during four particulary steady and dark nights averaging around 21.6 SQM. The last night saw 1.5" FWHM on 15 minute subs.

From astroeyes...

"A pretty faint and difficult galaxy, particularly the spiral arms. NGC 6140 in Draco is magnitude 12.6 with an average surface brightness of 16.5 magnitude per square arcminute, that's faint. Redshift distance is an estimated 42 MLy."

Comments

Author

KuriousGeorge
KuriousGeorge
License: None (All rights reserved)
1531
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Revisions

  • The challenging NGC 6140, 





    
        

            KuriousGeorge
    Original
  • Final
    The challenging NGC 6140, 





    
        

            KuriousGeorge
    B

B

A bit more noise processing.

Sky plot

Sky plot

Histogram

The challenging NGC 6140, 





    
        

            KuriousGeorge