Hemisphere:  Northern  ·  Contains:  Bode's Galaxy  ·  Cigar Galaxy  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
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M81 and M82, 


            Alf Jacob Nilsen
M81 and M82
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Technical card

Imaging telescopes or lenses: Nikon Nikkor TC14 II  ·  Nikon Nikkor 600mm f/4 Ai

Imaging cameras: ZWO ASI294MC PRO

Mounts: iOptron CEM60-EC

Guiding telescopes or lenses: ZWO 30mm f/4 Mini Guide Scope

Guiding cameras: ZWO ASI 120 Mini Mono

Software: Astro Pixel Processor APP  ·  Adobe Photoshop CC  ·  PixInsight Core Version 1.8 Ripley

Filters: IDAS (Tokai) LP-filter

Dates:April 21, 2020

Frames: 84x300"

Integration: 7.0 hours

Avg. Moon age: 28.08 days

Avg. Moon phase: 2.35%

Basic astrometry details

Astrometry.net job: 3474534

RA center: 9h 54' 27"

DEC center: +69° 20' 38"

Pixel scale: 3.205 arcsec/pixel

Orientation: 251.678 degrees

Field radius: 0.825 degrees

Resolution: 1500x1087

Locations: Osmundstø Observatorium (private backyard observatory), Hidrasund, Vest Agder, Norway

Data source: Backyard


Another image with Nikon 600mm + TC 14 and ZWO ASI294. I am please with the configuration, but still struggle with the background and have problems hiding the noice, which prevents me from displaying the background lighter. I continue to learn PI and hope to improve. Suggestion are most welcome :).



Alf Jacob Nilsen
License: None (All rights reserved)

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M81 and M82, 


            Alf Jacob Nilsen