IC342 re-processed by Jean Lammertyn

Jean re-processed the set of subs and retained 341 or 75% of the 2-minute subs.

The result is very impressive and offers a view on all nebulosity that surrounds the galaxy but also hides it from being very bright. This galaxy is very large and would fit within a half Moon. So the surface brightness is rather low, which makes it easy for the IFn and Milky Way nebulosity to dim it even further.

The image displays a wealth of information, not only IFN patches everywhere, but also galaxies and H-Alpha nebulosity to the right of the galaxy.

IC342 Processing: Jean Data: Joost 341x120s with EDPH76mm F 4.5 Sharpstar ASI2600MC UV/IR
Version with higher contrast

The bright nebulosity was not the intention of the processing. Apparently the brightness of the image shifted when the original TIF was saved as a JPG under Windows Photo software.

When starting from a PNG, the saved JPG did not brighten. This was the original intended result:

IC342 the ‘hidden galaxy’

IC342 is a spiral galaxy of magnitude 9 in the northern and obscure constellation of Camelopardalis (‘the Camel’). The low surface brightness makes this a challenging target for clean images. The size is about 20×21 arc minutes, or comparable to almost half the Moon.

IC342 Drogenberg Observatory, Sharpstar 76mm F4.5 APO, 344x120s with ASI2600MC

On the image a nice open star cluster (top left) Berkeley 10 (credit O. VanAelst) and some small galaxies are visible like eg. UGC 2789 magnitude 17

The image was obtained on 4 different nights in September and October 2024. Some nights high Cirrus-clouds were present, which can be seen around the brighter stars as a veil.

Equipment: Sharpstar 76 EDPH F 4.5 camera ASI2600MC and mount GM1000, no guiding.

More details and a full-resolution PNG on Astrobin

This is a post-processing of my image by Marc Verhoeven:

Re processing by Marc Verhoeven

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