Designation:
M103
Date:
July 10th, 2018
Camera:
Canon EOS 7D Mark II ( unmodified )
Optics:
Sky-Watcher ED120mm Doublet
Focal Length:
900 mm
Exposure:
38 x 60sec.
ISO:
1000
Mount:
Sky-Watcher NEQ6 Pro
Guiding:
Orion Star Shoot Auto Guider
Software:
Adobe Photoshop, DSS, Astroflat
Notes:
M103 ( an open star cluster located in the northern constellation Cassiopeia ) occupies an area 6 arc minutes in apparent size, corresponding to a linear diameter of 17.5 light years. It is easy to see, even with binoculars, and appears as a nebulous fan-shaped patch