2012-10-05 – M15 globular cluster, NGC457 Owl cluster

Messier 15 (M15) is a globular cluster located in the constellation Pegasus. I’ve included a version of this cluster both before image processing and after.

Details (for all images)

– Zhumell Z10 10″ Dobsonian telescope
– DIY EQ platform for sidereal tracking
– Canon T2i 550D DSLR, unmodified sensor
– Near-prime focus with 2″ GSO coma-corrector
– Image capture with Backyard EOS software

2012-10-05_M15_single_exposure.png
M15 globular cluster, directly from camera, no post processing
M15 globular cluster, 7x20s ISO3200 exposures and in-camera dark frame subtraction
M15 globular cluster, 7x20s ISO3200 exposures and in-camera dark frame subtraction

NGC457 is an open cluster in the constellation Cassiopeia, often referred to as the Owl Cluster or the E.T. cluster due to the shape and two bright stars (on the right) that resemble eyes of a creature, with wings or arms spread wide.

2012-10-05_NGC457_4x20s_ISO1600_stack_krita.png
NGC457, 4x20s ISO1600 exposures shot with in-camera dark frame subtraction

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