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Contains:  M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031
Getting plate-solving status, please wait...
M81 and M82, 





    
        

            Tom Butts
M81 and M82

M81 and M82

Technical card

Imaging telescope or lens:William Optics GT-71 Apo

Imaging camera:ZWO ASI1600MM-Cool

Mount:Skywatcher HEQ5 Pro

Guiding telescope or lens:Orion Mini 50mm Guidescope

Guiding camera:ZWO ASI120MM

Focal reducer:Williams Optics William Optics Flat6a

Filters:IDAS 2" LPS D2ZWO LRGB

Resolution: 2688x2184

Dates:March 19, 2018

Frames:ZWO LRGB: 135x120" (gain: 139.00) -20C bin 1x1

Integration: 4.5 hours

Darks: ~20

Flats: ~20

Bias: ~20

Avg. Moon age: 1.96 days

Avg. Moon phase: 4.27%

Bortle Dark-Sky Scale: 8.00

Astrometry.net job: 2035116

RA center: 148.929 degrees

DEC center: 69.336 degrees

Pixel scale: 2.323 arcsec/pixel

Orientation: 147.068 degrees

Field radius: 1.118 degrees

Data source: Backyard

Description

A work in progress. It's my first LRGB image with the ASI1600MM-C. I need to double the exposures to reduce noise and clean things up. Don't zoom in too close ;)

Comments

Author

TomButts
Tom Butts
License: Attribution-NonCommercial Creative Commons
2320
Like

Revisions

  • M81 and M82, 





    
        

            Tom Butts
    Original
  • M81 and M82, 





    
        

            Tom Butts
    B
  • Final
    M81 and M82, 





    
        

            Tom Butts
    C

B

Different processing methods, still need to fix blotchy background.

C

Experimenting with new processing techniques. Image is rotated because I took new Lum data. Not too sure if I like this iteration more or not..

Sky plot

Sky plot

Histogram

M81 and M82, 





    
        

            Tom Butts