Wednesday 29 January 2014

M42 with much nebulosity

This image of M42 was taken under very clear sky conditions . Notice the surrounding faint nebulosity in the hydrogen alpha regions . An 80mm refractor was used , PHD auto guiding and an Atik 383L mono CCD camera . The total exposure times were 90 minutes using a H-alpha filter, 20 minutes using an O111 filter and ten minutes using RGB filters: