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Contains:  NGC 6781
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NGC 6781, 





    
        

            Chris Sullivan
NGC 6781

NGC 6781

Technical card

Imaging telescope or lens:TPO/GSO RC8

Imaging camera:ZWO ASI 1600MM Cool

Mount:SkyWatcher AZ-EQ5

Guiding telescope or lens:ZWO Off Axis Guider

Guiding camera:Starlight Xpress Lodestar Autoguider X2

Filters:ZWO H-alpha 7nmZWO OIII

Resolution: 4516x3408

Dates:July 30, 2018Aug. 5, 2018

Frames:
ZWO H-alpha 7nm: 21x300" (gain: 139.00)
ZWO OIII: 17x300" (gain: 139.00)

Integration: 3.2 hours

Avg. Moon age: 20.02 days

Avg. Moon phase: 67.88%

Bortle Dark-Sky Scale: 8.00

Astrometry.net job: 2186571

RA center: 289.620 degrees

DEC center: 6.532 degrees

Pixel scale: 0.244 arcsec/pixel

Orientation: 357.802 degrees

Field radius: 0.192 degrees

Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States

Data source: Backyard

Description

Just a short interlude I did while waiting for another target to rise. I can't remember the last time I gave an object so little time (especially at f/8!). It's a little noisy, but I'm happy with what I got for just over 3 hours. I've taken down this scope already, but I might have to add to it and add RGB stars next year.

Comments

Author

Chris-PA
Chris Sullivan
License: None (All rights reserved)
3866
Like

Revisions

  • NGC 6781, 





    
        

            Chris Sullivan
    Original
  • NGC 6781, 





    
        

            Chris Sullivan
    C
  • NGC 6781, 





    
        

            Chris Sullivan
    D
  • Final
    NGC 6781, 





    
        

            Chris Sullivan
    E

C

Crop

D

Cleaned up the background, adjusted levels, reduced saturation. I'm still mad I didn't give this one more time. I definitely want to add to it next year.

E

Crop of revision.

Sky plot

Sky plot

Histogram

NGC 6781, 





    
        

            Chris Sullivan