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Contains:  NGC 3628, M 66, NGC 3627, M 65, NGC 3623
Getting plate-solving status, please wait...
Leo Trio (M65, M66, NGC 3628), 


            Gary Lopez
Leo Trio (M65, M66, NGC 3628)

Leo Trio (M65, M66, NGC 3628)

Technical card

Resolution: 4276x3233

Dates:April 2, 2017April 3, 2017April 9, 2019

Orion 2" Skyglow Filter: 101x180" ISO1600
Astrodon L Gen 2 E-series 31mm: 153x60" -15C bin 1x1

Integration: 7.6 hours

Darks: ~30

Bias: ~50

Avg. Moon age: 5.69 days

Avg. Moon phase: 33.09%

Bortle Dark-Sky Scale: 4.00 job: 2641998

RA center: 11h 19' 43"

DEC center: +13° 17' 27"

Pixel scale: 0.781 arcsec/pixel

Orientation: 85.180 degrees

Field radius: 0.581

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard


This is another experiment combining DSLR RGB data with HDR luminance from a cooled CMOS camera. In this case the RGB was collected two years ago using a Canon 70D (unmodified) mounted on a 6"RC, and the luminance data was collected with an ZWO ASI1600MM Pro mounted on a 8" Newtonian. Once again, I really like the look. The colors provided by the DSLR are subtle (although there is a lack of reds and a bit of a blue-green shift, characteristic of the unmodified Canon70D), while the luminance layer brings the image into remarkable clarity. I have provided the original DSLR image (Version B) for comparison.



Gary Lopez
License: None (All rights reserved)


  • Final
    Leo Trio (M65, M66, NGC 3628), 


            Gary Lopez
  • Leo Trio (M65, M66, NGC 3628), 


            Gary Lopez


Original DSLR image

Sky plot

Sky plot


Leo Trio (M65, M66, NGC 3628), 


            Gary Lopez