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Melotte 15, at the core of the Heart nebula

Open cluster Melotte 15 and nearby gas and dust clouds at the core of IC 1805, the Heart Nebula in Cassiopeia.

This is a HOO blend of H-alpha and O3 narrowband subs. The NB filters were the Optolong 7nm H-a and 6.5nm O-III, in a QHY CFW2M-US in front of a QHY163M camera.The scope was a William Optics FLT110 with Flat4, mounted on a Skywatcher AZ EQ6-GT. Imaging was managed via Sequence Generator Pro with PHD2 for guiding and autofocus enabled via a Lakeside Astro motorized focuser.

All post-processing was done in PixInsight and the image is a stack of 109 x 2 minute H-alpha and 65 x 2 minute O-III subs.

Taken from Prachinburi, Thailand

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Uploaded on November 19, 2018