Hemisphere:  Northern  ·  Contains:  NGC 869  ·  NGC 884  ·  The star 7Per  ·  The star 8Per  ·  chi Persei Cluster  ·  h Persei Cluster
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Double Cluster in Perseus, 


            Alf Jacob Nilsen
Double Cluster in Perseus
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Technical card

Imaging telescopes or lenses: Celestron RASA8

Imaging cameras: ZWO ASI1600 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: Baader 36mm R  ·  Baader 36mm G  ·  Baader 36mm B

Dates:Oct. 16, 2020

Baader 36mm B: 60x30" (gain: 139.00) -18C bin 1x1
Baader 36mm G: 60x30" (gain: 139.00) -20C bin 1x1
Baader 36mm R: 60x29" (gain: 139.00) -19C bin 1x1

Integration: 1.5 hours

Flats: ~23

Avg. Moon age: 29.15 days

Avg. Moon phase: 0.16%

Basic astrometry details

Astrometry.net job: 3963854

RA center: 2h 20' 34"

DEC center: +57° 29' 2"

Pixel scale: 4.575 arcsec/pixel

Orientation: 171.266 degrees

Field radius: 1.394 degrees

Resolution: 1488x1612

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

Data source: Backyard


I am pleased with this rather short exporsure of the Double Cluster in Perseus. I think it shows the beauty of the stars. The square format also fits this image from my point of view.



Alf Jacob Nilsen
License: None (All rights reserved)

Sky plot

Sky plot


Double Cluster in Perseus, 


            Alf Jacob Nilsen