SUNSET: 
0
Photographer:
Rod Pommier
Location of Photo:
Pommier Observatory, Portland, OR, USA
Date/Time of photo:
2024-05-13 through 2024-05-14
Equipment:
PlaneWave CDK17 on L500 mount, SBIG STL 11000 CCD camera with Baader Planetarium L, R, G, and B filters
Description:
M3 is a Shapley-Sawyer Class VI globular cluster lying at a distance of 33,920 light-years from Earth in the constellation Canes Venatici. It is probably the second most well-known northern globular cluster after M13 in Hercules. The interesting feature in M3 is a meandering dark line crossing the entire cluster. This line gives the globular cluster an appearance resembling a cracked egg. That globular clusters contain dark obscuring nebular material has been known since the early 1960s. Exposures: L:R:G:B = 170:65:65:65 minutes = 6 hours, 5 minutes total exposure at f/6.8, completely unguided.
