The Blue Horse Nebula IC4592 (Mau_Bard)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: 10 Sco) · 10 ome02 Sco · 12.08 · 14 Sco) · 14 nu. Sco · 4 Oph · 4 psi Oph · 7 Oph · 7 chi Oph · 8 Sco A) · 8 Sco B · 8 bet01 Sco · 8 bet02 Sco · 80 Sappho · 9 Sco) · 9 ome01 Sco · Akrab (β1 Sco · B230 · B40 · B41 · B43 · Graffias · HD143438 · HD143616 · HD143713 · HD143714 · HD143785 · HD143842 · HD143899 · HD143956 · And 88 more.

The Blue Horse Nebula IC4592

Definitively a challenge from my location, this was the most difficult gradient processing I ever faced. It was nearly a miracle I could squeeze something out of it, given the discouraging appearance of the integrated image!
This target was extremely low on the horizon, nearly in the direction of the city center, with sky illumination and gradients flooding the field. Clouds also where not helping and I had to discard a lot of data.
I used local normalization to regularize the gradients; the signal was deeply buried below the sky glow. It took a lot of patient work to make IC4592 surface and decently visible.
I hope to have in summer the opportunity to observe this object from a darker location where I can see it at an higher altitude in the sky. But, at least, me and IC4592 had now the opportunity to get to know each other!

IC4592
It is a reflection nebula illuminated by nu Scorpii, therefore placed at the same distance of the star, that is 375 pc.
Its shape reminds the head of a horse or of a greyhound dog, according to taste.

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Title: Annotated

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Status	Advanced success
Started	...
Astrometry.net job	9778495
PixInsight job	78FWWH48DB6KPE4U9NREZO66N2ML5HJC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h15m04s.34
RA (top/left)	15h59m21s.66
RA (top/right)	16h30m56s.47
RA (bottom/right)	16h30m19s.30
RA (bottom/left)	15h59m43s.21

Dec (center)	-19°21′24″.9
Dec (top/left)	-21°54′00″.4
Dec (top/right)	-21°51′13″.9
Dec (bottom/right)	-16°43′49″.1
Dec (bottom/left)	-16°46′46″.4

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The Blue Horse Nebula IC4592

The Blue Horse Nebula IC4592

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The Blue Horse Nebula IC4592

The Blue Horse Nebula IC4592

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