Horsehead Nebula IC 434 (astropical)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 46 Ori) · 46 eps Ori · 48 Ori · 48 sig Ori · 50 Ori) · 50 zet Ori · Alnilam · Alnitak · Flame Nebula · Horsehead nebula · IC 431 · IC 432 · IC 434 · IC 435 · NGC 2023 · NGC 2024 · Orion · Orion B · Part of the constellation Orion (Ori) · The star Alnilam (ε Ori · The star Alnitak (ζ Ori · The star σ Ori

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Horsehead Nebula IC 434

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Horsehead Nebula IC 434

This picture is probably the best in my infant deepsky nursery.
The sky was humid and a little hazy but thanks to the fast Samyang lens wide open at f/2.0 it didn't take 3 hours to complete as shown. Focusing the lens with a Bathinov mask took longer than that (well, not exactly). Flats were a must due to heavy vignetting although the lens wasn't fogged by the high humidity, nor otherwise contaminated or obstructed. Hmmm...
A filter blocking artificial light and infrared is crucial as the bright stars in the field would blow up way too much. Even better would be a narrow band filter. This time I got away with a gentle star reduction in Siril.

Final
Original
B
C
D

B

Title: Annotated

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C

Description: Orion, taken in parallel with a 35mm lens stopped at f3.3 on a Nikon D5500. 125 x 60 sec at ISO1600.

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D

Title: Session Summary

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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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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8902476
PixInsight job	SDH8CV8SV7VSLY7VZR7VY9PSE4TD4SDA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h40m57s.96
RA (top/left)	05h31m59s.99
RA (top/right)	05h51m13s.83
RA (bottom/right)	05h49m55s.16
RA (bottom/left)	05h30m43s.79

Dec (center)	-02°18′47″.10
Dec (top/left)	-03°57′03″.8
Dec (top/right)	-03°22′22″.9
Dec (bottom/right)	-00°40′25″.10
Dec (bottom/left)	-01°14′40″.2

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Horsehead Nebula IC 434

Horsehead Nebula IC 434

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Horsehead Nebula IC 434

Horsehead Nebula IC 434

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