Hemisphere:  Northern  ·  Contains:  NGC 869  ·  NGC 884  ·  The star 7Per  ·  The star 8Per  ·  The star 9Per  ·  chi Persei Cluster  ·  h Persei Cluster
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Double Cluster (NGC869 and NGC884), 


            Lee B
Double Cluster (NGC869 and NGC884)
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Double Cluster (NGC869 and NGC884)

Technical card

Imaging telescopes or lenses: William Optics RedCat 51

Imaging cameras: ZWO ASI533MC Pro

Mounts: Sky-Watcher AZ EQ6 GT Pro

Software: Starkeeper.it Voyager  ·  PixInsight  ·  Aries Productions Astro Pixel Precessor  ·  PHD2

Dates:Nov. 22, 2020

Frames: 170x30"

Integration: 1.4 hours

Avg. Moon age: 7.66 days

Avg. Moon phase: 52.95%

Basic astrometry details

Astrometry.net job: 4080354

RA center: 2h 20' 32"

DEC center: +57° 7' 12"

Pixel scale: 3.130 arcsec/pixel

Orientation: 255.052 degrees

Field radius: 1.814 degrees

Resolution: 2950x2950

Data source: Backyard


A quick 200 frames of the double cluster while waiting for another target. This is 170 of those as selected by APP for 85 minutes.

I was really pleased with the field of view and appreciated the double cluster even more with a huge rich star field all around it. A photographic or visual treat.



Lee B
License: None (All rights reserved)


  • Double Cluster (NGC869 and NGC884), 


            Lee B
  • Final
    Double Cluster (NGC869 and NGC884), 


            Lee B

Sky plot

Sky plot


Double Cluster (NGC869 and NGC884), 


            Lee B

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William Optics CAT Series