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Hemisphere:  Northern  ·  Contains:  Double cluster, IC 1805, IC 1848, NGC 281, NGC 7822, NGC 869, NGC 884, NGC 896, The constellation Cassiopeia (Cas), The star 50Cas, The star Caph (βCas), The star Navi (γCas), The star Ruchbah (δCas), The star Schedar (αCas), The star εCas, The star ζCas, The star ηCas, The star θCas, The star κCas
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Cassiopeia and vicinity in H-alpha, 


Cassiopeia and vicinity in H-alpha
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Cassiopeia and vicinity in H-alpha

Technical card

Imaging telescopes or lenses: Nikkor AF-S DX Micro 40mm 2.8G

Imaging cameras: Astrel Instruments AST8300

Mounts: SkyWatcher HEQ5 PRO Goto

Software: Adobe Lightroom 5.7  ·  Fitswork 4.47

Filters: Baader LRGB 1.25'' Filters, Ha, SII, OIII

Dates:Sept. 29, 2017

Frames:Baader LRGB 1.25'' Filters, Ha, SII, OIII: 12x300" -20C bin 1x1

Integration: 1.0 hours

Darks: ~24

Avg. Moon age: 8.62 days

Avg. Moon phase: 62.99%

Basic astrometry details job: 1756824

RA center: 0h 57' 39"

DEC center: +60° 52' 33"

Pixel scale: 27.744 arcsec/pixel

Orientation: 223.492 degrees

Field radius: 16.067 degrees

Resolution: 3341x2495

Locations: Home, Hornstein, Burgenland, Austria


I attached the Nikon AF-S DX 40mm 1:2.8 lens to my CCD via the Geoptik adapter. Due to a small tilt in the setup it was not possible to have perfect focus over the whole frame. I took totally 12 frames each 300s, half focussed the upper part, the other half the lower part of the picture. Then I stiched the two useful halfs together. So the effective exposure time is only 30min.



License: None (All rights reserved)

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Cassiopeia and vicinity in H-alpha,