Telescope: Unitron 510 5” f/16 refractor, Atlas EQ-G
Camera: Canon EOS Ra full frame DSLR
Filter: 2” Baader Fringe Killer (minus V)
Guide scope: Williams Optics 50mm Guidescope, ASI290MM, PHD
Exposure: 16x60sec, ISO 1600, saved as RAW
Darks: Internal (Long Exposure Noise Reduction)
Flats: 64x1/125s sky flats taken at dusk
Average Light Pollution: Bortle 8, fair transparency
Lensed Sky Quality Meter: 18.5 mag/arc-sec^2
Stacking: Mean with a 1-sigma clip
White Balance: Nebulosity Automatic
Software: Backyard EOS, Deepsky Stacker, Nebulosity, Photoshop
M103 is one of several open clusters in Cassiopeia. It is small, rather sparse, and was once thought to be an asterism rather than a true cluster, but it has since been shown to be a distant open cluster. Located just 1.5 degrees northeast of delta Cassiopeia it is easy to find and makes a nice target for small telescopes.
M103 is currently high in the northeast during the early evening.
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