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Contains:  NGC 869, NGC 884, The star 7Per, The star 8Per, chi Persei Cluster, h Persei Cluster
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h & chi - Double Cluster, 


            Robert Eder
h & chi - Double Cluster
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h & chi - Double Cluster

Technical card

Imaging telescopes or lenses: Sky-Watcher 130/650 PDS Newton

Imaging cameras: Canon 600Da

Mounts: Skywatcher NEQ-5

Focal reducers: SkyWatcher Synta Coma Corrector

Software: Astro Pixel Processor  ·  Astra Image  ·  Astronomy Tools Action Set  ·  Photoshop

Filters: Astronomik L2 UV/IR Block

Dates:Sept. 18, 2020

Frames: 790x30" ISO800

Integration: 6.6 hours

Darks: ~20

Flats: ~40

Bias: ~50

Avg. Moon age: 1.21 days

Avg. Moon phase: 1.64%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details job: 3946431

RA center: 2h 20' 31"

DEC center: +57° 11' 31"

Pixel scale: 2.754 arcsec/pixel

Orientation: 345.099 degrees

Field radius: 1.174 degrees

Resolution: 2516x1758

Locations: Hohe Wand, Postl Wiese, Austria

Data source: Traveller


My favorite star cluster. Every night I have to look at it at least once.
While my big setup was imaging NGC 7331, this was made with the baby newton on the EQ5 without guiding, like in the old days.😄
It took me awhile to recognize, but there is a tiny little bit of Ha at the bottom.



Robert Eder
License: None (All rights reserved)


  • h & chi - Double Cluster, 


            Robert Eder
  • Final
    h & chi - Double Cluster, 


            Robert Eder


Description: Enhanced Ha from the red channel

Sky plot

Sky plot


h & chi - Double Cluster, 


            Robert Eder