Contains: NGC 884, Double cluster, NGC 869
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The Double Cluster in Perseus

Technical card

Imaging telescope or lens: Skywatcher Explorer 200PDS

Imaging camera: QHYCCD QHY9M

Mount: Skywatcher NEQ6 PRO Synscan

Guiding telescope or lens: Skywatcher 9x50 finderscope

Guiding camera: QHYCCD QHY5L-IIc

Focal reducer: Baader MPCC Mk III

Software: PixinsightPhotoshop

Filters: Baader Red 2"Baader L 2''Baader Blue 2"Baader Green 2"

Accessories: QHYCCD QHY 2" Filter wheelSeletek Armadillo

Resolution: 3269x2476

Dates: Sept. 12, 2016

Baader Blue 2": 12x300" -20C bin 1x1
Baader Green 2": 12x300" -20C bin 1x1
Baader L 2'': 34x300" -20C bin 1x1
Baader Red 2": 12x300" -20C bin 1x1

Integration: 5.8 hours

Flats: ~15

Bias: ~100

Avg. Moon age: 10.22 days

Avg. Moon phase: 78.36% job: 1238036

RA center: 35.066 degrees

DEC center: 57.087 degrees

Pixel scale: 1.107 arcsec/pixel

Orientation: -171.649 degrees

Field radius: 0.630 degrees

Locations: Puolivälinkangas - Oulu, Oulu, Finland


The forecast was partly cloudy and for a change I wanted something I could finish in one night. So I went for the double cluster, which I hadn't shot before with this setup. Of course, the weather stayed clear and I ended up with 6 hours of material. No complaints.




Sky plot

Sky plot


The Double Cluster in Perseus,