Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
Cosmic Catastrophe! M81 and M82, Scott Denning
Cosmic Catastrophe! M81 and M82
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Cosmic Catastrophe! M81 and M82

Cosmic Catastrophe! M81 and M82, Scott Denning
Cosmic Catastrophe! M81 and M82
Powered byPixInsight

Cosmic Catastrophe! M81 and M82

Equipment

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Acquisition details

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Description

M81 and M82 Feb 23 - Mar 5 2019 Back Yard

31 x 600 LRGB + 32 x 1200 Ha (total exposure ~ 16 hours!)

Borg 125SD f/8 (1050 mm)

ASI 1600 at -15 C

Paramount MyT unguided

calibrated, subframe selected, weighted, integrated, cropped

DBE each of L, R, G, B, Ha


Linear fit channel combined to get RGB

Pixel math to enhance RGB w Ha

Pixelmath to enhance L with Ha

LRGB combine

Linear noise reduction with MLT


Manual histogram stretch

TGV nonlinear noise reduction

Curves for luminance

HDR MT for galaxy contrast enhancement

Local Histogram Equalization (radius = 84, amount = 52%)

SCNR

Comments

Sky plot

Sky plot

Histogram

Cosmic Catastrophe! M81 and M82, Scott Denning