Contains: M 52, NGC 7654, Bubble nebula, NGC 7635, NGC 7538, IC 1470, The star 4Cas
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Bubble and Cave Nebulae

Technical card

Imaging telescope or lens: Olympus Zuiko 200mm f/4

Imaging camera: Canon T2i/550D

Mount: CGEM

Guiding telescope or lens: Orion 50 mm mini guider

Guiding camera: Orion USA Star Shoot Auto Guider

Software: Backyard EOS 3.1.8ProDigital Software Astronomy ToolsPHDPhotoshop CS5MLUnsold Images Plus

Resolution: 4895x3325

Dates: Sept. 21, 2017

Frames: 35x180" ISO800 30C

Integration: 1.8 hours

Darks: ~11

Flats: ~25

Flat darks: ~25

Avg. Moon age: 1.29 days

Avg. Moon phase: 1.86%

Bortle Dark-Sky Scale: 4.00

Temperature: 20.01 job: 1743215

RA center: 346.680 degrees

DEC center: 62.171 degrees

Pixel scale: 4.432 arcsec/pixel

Orientation: 357.640 degrees

Field radius: 3.643 degrees



Dave Venne

Sky plot

Sky plot


Bubble and Cave Nebulae, 


        Dave Venne