Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1805  ·  IC 1831  ·  IC 1848  ·  NGC 281  ·  The constellation Cassiopeia (Cas)  ·  The star Caph (βCas)  ·  The star Navi (γCas)  ·  The star Ruchbah (δCas)  ·  The star Schedar (αCas)  ·  The star εCas  ·  The star ηCas  ·  The star ηPer  ·  The star θCas  ·  The star ιCas  ·  The star κCas
Cassiopeia (Astrotracer), 


Cassiopeia (Astrotracer)
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Cassiopeia (Astrotracer)

Technical card

Imaging telescopes or lenses: SMC Pentax-A 50mm f/1.4

Imaging cameras: Pentax K-3 II

Dates:Aug. 15, 2020

Frames: 140x30" ISO400

Integration: 1.2 hours

Avg. Moon age: 25.72 days

Avg. Moon phase: 15.54%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.90

Basic astrometry details

Astrometry.net job: 3764042

RA center: 1h 30' 12"

DEC center: +62° 39' 32"

Pixel scale: 30.841 arcsec/pixel

Orientation: 90.575 degrees

Field radius: 15.521 degrees

Resolution: 2012x3014

Data source: Traveller


Seventy minutes of total exposure. Tracking was done internally in the camera by Astrotracer, with the camera mounted directly to a tripod. The lens was stopped down to f/2.8.

This is a preliminary edit. Sequator was used for stacking, DBE and SCNR applied in PixInsight LE, stretching in rnc-color-stretch, and then further stretching, defringing and downsizing to 50% from the 24Mpixel original, in Picture Window Pro. Minimal cropping. No darks, flats or bias frames were applied.


Sky plot

Sky plot


Cassiopeia (Astrotracer),