Horsehead Nebula (Simonas Pauliukevičius)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Horsehead nebula · IC 434 · NGC 2023 · The star Alnitak (ζOri)

Horsehead Nebula, Simonas Pauliukevičius

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Horsehead Nebula

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Horsehead Nebula

First light for the roll off roof obsy I and my friends built in the countryside (Bortle 3)

The wallpaper of Horsehead was sitting on my desktop for at least two years, so probably this was what subconsciously motivated me try capturing it myself. The processing was quite a challenge as I'm using ZWO filters which seems to work fine in most cases except when there's a bright star present in the field - Alnitak in this case - G and B exhibited quite prominent halos while R was mostly ok. Ha had it's own issues with light leaking through edges of the filter and producing internal reflections. I solved that by simply painting a black marker over the edges of the filter which fixed the reflection issue but obviously did not fix halos which I then tried to fix by modelling the halos for each color channel in Pixinsight and then subtracting the model from each channel. This process allowed to correct halos to some extent but not to the point I want in to be, so I guess I'll try fixing the halos separately per-night's worth of imaging data and not the stack of all integrations. Or just buy better filters

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Basic success
Started	...
Astrometry.net job	3289632
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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