Thursday, October 15, 2020

A night for Open Clusters

Tuesday night promised to be mostly clear and calm with rising humidity. With the likely suboptimal transparency, subpar seeing and night shortening fogging due to humidity the  focus would be on open clusters. The first two targets IC4665 and IC4756 were acquired with 12x15s exposures. The remaining were sets of 12x30s exposure subframes. With the nights calm winds and previous AVX mount gear adustments guiding went very well. By 11 PM the Celestron 8 corrector plate was starting to fog up signaling the end of the session. The 11 images acquired appear below. Update: These images were reprocessed in April 2023 using the free GraXpert gradient elimination app.

IC1665

IC4756

Messier 52

NGC457

NGC869

NGC884

NGC957

NGC6633

NGC6871

NGC6883

NGC7039

NGC7082

NGC7243

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