Hemisphere:  Northern  ·  Contains:  M 33  ·  NGC 598  ·  Triangulum Galaxy  ·  Triangulum Pinwheel
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Messier 33, 


            Alf Jacob Nilsen
Messier 33
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Technical card

Imaging telescopes or lenses: Celestron RASA8

Imaging cameras: ZWO ASI294MC PRO

Mounts: iOptron GEM45EC

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

Guiding cameras: ZWO ASI120Mini

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

Filters: IDAS (Tokai) LP-filter

Dates:Oct. 11, 2020Oct. 14, 2020

Frames:IDAS (Tokai) LP-filter: 96x180" (gain: 120.00) -18C bin 1x1

Integration: 4.8 hours

Flats: ~25

Avg. Moon age: 25.23 days

Avg. Moon phase: 21.30%

Basic astrometry details

Astrometry.net job: 3967824

RA center: 1h 34' 3"

DEC center: +30° 39' 46"

Pixel scale: 4.442 arcsec/pixel

Orientation: 97.314 degrees

Field radius: 1.510 degrees

Resolution: 1976x1444

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

Data source: Backyard


Another great galaxy integrated with RASA 8 over two nights. This is the last of 13 images obtained in September-October when we had clear skies for quite a few nights (most unusual here along the south-western coast of Norway). At present it is grey and raining, but hoping for a few clear nights in November. Comments are welcome, enjoy...



Alf Jacob Nilsen
License: None (All rights reserved)

Sky plot

Sky plot


Messier 33, 


            Alf Jacob Nilsen