Dark Horse (Vitaly)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · HD294297 · HD294301 · HD294302 · HD294303 · HD37686 · HD37699 · HD37805 · HD37903 · Horsehead nebula · IC 434 · LBN 953 · LBN 954 · NGC 2023 · Orion B · Sh2-277 · V0608 Ori · V0610 Ori · V0612 Ori · V0615 Ori · V0616 Ori · V2754 Ori

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Dark Horse

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Dark Horse

This is an integration over several nights done in February/March 2022.
For some reason I got some "extra" stuff probably coming from the bright Alnitak star. Although the star was out of the view, but its light somehow was still captured during all imaging sessions.
Probably cos of some reflections happening in the imaging train. They look like sort of vertical pillars of light. There is also a circular halo around the center of the image which I could diminish during the stretch.

⭐⭐⭐

Total integration of 7 hours 40 minutes at 1506mm focal length
Sensor temperature -20C
Gain 121
Binning 2

PixInsight Workflow which gave me this result:

Stacking with WBBP:
no bias
subframe weighting as PSF Signal Weight
calibration with rejection algorithms set to Auto except for Lights set to Winsorized Sigma Clipping (experimented with others, same result but takes longer to process)
with NO local normalization this time (with it set to ON gave me ugly results)
create separated RGB channels

Postprocessing:
didn't drizzle this time
Linear fit with referenced on R channel (the weakest signal) and combine channels back
Channel Match (moved a bit R and B to even more compensate for the diffraction issues)
DBE subtraction with Normalize
ImageSolver
SPCC
Crop
BlurXTerminator
NoiseXTerminator
Stretching with GeneralizedHyperbolicStretch
NoiseXTerminator just a little bit
SCNR(0.60) to get rid of the green cast

C8 XLT Celestron Deep Space
Optolong L-Pro filter
The OSC Club (One Shot Camera)
ZWO ASI 294MC PRO
Schmidt-Cassegrain Telescope (SCT) Imagers
Astrophotography Germany

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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	7349597
PixInsight job	Z9DDBTA4KZ6QGLC1GRA5YP6LE9FBEOY9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h40m55s.35
RA (top/left)	05h40m07s.37
RA (top/right)	05h40m00s.65
RA (bottom/right)	05h41m43s.37
RA (bottom/left)	05h41m50s.28

Dec (center)	-02°26′28″.5
Dec (top/left)	-02°10′24″.5
Dec (top/right)	-02°41′09″.8
Dec (bottom/right)	-02°42′32″.9
Dec (bottom/left)	-02°11′49″.5

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Dark Horse

Dark Horse

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Image Index:

Contribution Index (beta):

Dark Horse

Dark Horse

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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