Hemisphere:  Northern  ·  Contains:  M 1  ·  NGC 1952
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The Crab Nebula, 


            Alf Jacob Nilsen
The Crab Nebula
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Technical card

Imaging telescopes or lenses: GSO RC 254/2000 Carbon OTA

Imaging cameras: ZWO ASI294MC PRO

Mounts: iOptron CEM60-EC

Guiding telescopes or lenses: Skywatcher EvoGuide 50ED

Guiding cameras: Starlight Xpress Lodestar 2

Focal reducers: Starizona APEX L 0.65

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

Filters: IDAS (Tokai) LP-filter

Accessory: Optec TCF-S

Dates:Jan. 8, 2021

Frames: 66x300"

Integration: 5.5 hours

Avg. Moon age: 24.41 days

Avg. Moon phase: 26.89%

Basic astrometry details

Astrometry.net job: 4143985

RA center: 5h 34' 26"

DEC center: +22° 0' 36"

Pixel scale: 1.177 arcsec/pixel

Orientation: 258.151 degrees

Field radius: 0.405 degrees

Resolution: 2000x1464

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

Data source: Backyard


My first attempt this winter for the Crab Nebula. I could bneed a lot more minutes, which I hope to gather during this season. Anyway, it is fascinating to know that this was once a bright star in the sky and that astronomers saw the nova in 1054!



Alf Jacob Nilsen
License: None (All rights reserved)

Sky plot

Sky plot


The Crab Nebula, 


            Alf Jacob Nilsen