Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO (Eric Walden)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224 · The star 32 And

Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO

This was a very challenging data set to process. Once again proving that catching the photons is the easy part now. The main issue is that APP is currently unable to properly process mosaics when there is a bright object at the center where the panels converge. The usually outstanding normalization and LNC functions cannot manage it and the result is a severely light and color balance mess that cannot be further processed.

I processed each frame separately, did the light pollution and normalization, and then combined these frames in the mosaic workflow without LNC. There is still some uneven blending on the overlap, but it much better and even across the frame.

These are Ha and O3 data only, but the color and detail came out quite nicely I think. I was hoping to see some of the recently discovered O3 cloud, but I'd need a lot more data to do that, and this project has gone on long enough!

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	8702836
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO

Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO

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Image Index:

Contribution Index (beta):

Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO

Messier 31 - Great Andromeda Galaxy - Four Panel Mosaic - HOO

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Sky plot

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