Late Horsehead nebula (Palmito)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · Horsehead nebula · IC 434 · LBN 953 · LBN 954 · NGC 2023 · Orion B · Sh2-277

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Late Horsehead nebula

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Late Horsehead nebula

I have just been able to grab a few subs of the Horsehead nebula very late in the season, target was between 30 and 20°.

Subs have been captured between the 31st of March until the 11th of April.

I was challenged by vertical banding to process out. Mainly due to gain 0 and probably not dithering aggressively enough... Also I am missing imaging time...

Overall I am happy of the result considering conditions.

I am still trying to remove halos, but that as proven very hard. I tried StarHaloReducer, GAME and manual masking without success:

- GAME worked best but left a single light ring on the edge of the halo.

- StarHaloReducer shows a black square around the halo.

- Manual masking and then using ATrousWavelet or Curves Transformation yielded poor results.

Any advise, hints or comments on this very much appreciated ;-)

Original
B
Final
C

B

Description: Reworked Local Histogram Equalization:
- Better masked used
- Better settings

Uploaded: ...

C

Description: Reduced OIII halos

Uploaded: ...

The refractors!
Cloudy Nights
AAA : Astronomes et Astrographes Amateurs
Narrowband imaging
Suburban Astrophotography
PixInsight Addicts
Losmandy mounts
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	3495625
PixInsight job	6ZNWBE4QYE245ECAPEI7SMQG4JKI75QL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h41m14s.375
RA (top/left)	05h39m44s.844
RA (top/right)	05h39m52s.270
RA (bottom/right)	05h42m43s.943
RA (bottom/left)	05h42m36s.616

Dec (center)	-02°34′24″.70
Dec (top/left)	-02°06′33″.70
Dec (top/right)	-03°03′42″.20
Dec (bottom/right)	-03°02′15″.72
Dec (bottom/left)	-02°05′06″.79

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Late Horsehead nebula

Late Horsehead nebula

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Late Horsehead nebula

Late Horsehead nebula

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