SUNSET: 
0
Photographer:
Rod Pommier
Location of Photo:
Pommier Observatory, Portland, OR, USA
Date/Time of photo:
2024-07-25 through 2024-09-03
Equipment:
planewave CDK17 on L500 mount, SBIG STL 11000 CCD camera with Baader Planetarium L, R, G, and B filters.
Description:
Messier 15 is a Shapley-Sawyer Class IV globular star cluster lying 32,600 light-years from Earth in the constellation Pegasus, just of the star Enif. Shapley-Sawyer Class IV globulars have a fair amount of scattered peripheral stars, but their hallmark is that they still have a small, unresolvable core. In the case of M15, the unresolvable core is triangular in shape and intensely bright. However, my CKD17 used to capture this image was capable of resolving the stars right down to the center of the bright core. The red giant and "blue strangler" stars, the latter of which is thought to be due to smaller stars colliding to make "new" blue giant stars, are well seen in this image. Exposures: L:R:G:B = 125:75:75:75 minutes =1 hour 15 minutes 5 hours, 50 minutes, completely unguided.
