Hemisphere:  Northern  ·  Contains:  Cigar Galaxy  ·  Cigar galaxy  ·  M 82  ·  M82  ·  NGC 3034
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M82 (Pure, Deep and Final), 


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M82 (Pure, Deep and Final)

Technical card

Astrometry.net job: 3486251

RA center: 9h 55' 49"

DEC center: +69° 42' 21"

Pixel scale: 0.468 arcsec/pixel

Orientation: -178.569 degrees

Field radius: 0.264 degrees

Resolution: 2763x2976

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard


M82 (Pure, Deep and Final)

I had an idea for one more M82 version...

PURE because I use a Lighten blend of Ha over RGB. I believe this preserves the RGB much more than a screen blend.

DEEP because I use 20 hours of Ha in a 21.3 SQM sky.

FINAL because I promise this is the last version – at least for 2020. (-:

The layering technique used here is...

Ha(Screen)L - Ha(Lighten)RGB.

Here's all the previous versions for quick reference...

M82 5 hours
M82 13.8 hours
M82 43 hours with Adam Block 32" Ha in moonlit sky
M82 35 hours with KG 24" Ha in 21.3 SQM sky




Sky plot

Sky plot


M82 (Pure, Deep and Final),