SH2-173: With Several Dark-Nebulae (Alex Woronow)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: LBN 592 · LBN 593 · LDN 1282 · LDN 1283 · PGC 2796332 · Sh2-173 · The star 12 Cas

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SH2-173: With Several Dark-Nebulae

Powered byPixInsight

SH2-173: With Several Dark-Nebulae

SH2-173: With Several Dark-Nebulae

Capture Rig:
OTA: Cervolo 300 Astrograph
Camera: FLI MicroLine 16200 CCD
    Pixel Resolution: 0.84"
Observatory: Amateur Astronomers' Assoc., GRT
Date of Capture: Nov '21
Date of Processing: Aug '24

Exposures Used:
Narrowband: 39.5h (the best ¾ of the captured data)
Image Width: 1d 1'

Processing Tools:
1.    Commercial: PixInsight, Topaz, Radiant Photo, PhotoDirector, 3DLUT Creator
2.    Pixinsight Addons: NoiseXTerminator, BlurXTerminator, StarXTerminator
3.    My Scripts: NB_Assistant, AC_Restar, Subframe Weighting Tool (w/ J. Hunt), ColorTweaker, StarTweaker

Target Description:
The region has been extensively studied in the infrared spectrum, revealing details about the formation of stars and the structure of the nebula that are not visible in optical wavelengths. The dust within the nebula absorbs visible light but emits strongly in the infrared, making this wavelength crucial for understanding the processes happening within Sh2-273. (ChatGPT)

Processing Description:
This an approximate "true-color" mapping of HSO data to RGB colors. The intent was a high dynamic range, high contrast image. The objective was to reveal as much brightness and color detail as possible from a hydrogen-dominated field-of-view.

Target Statistics:
Distance: 5,200 ly
Apparent Magnitude: 9
Pixel Span at Target: 2E10 km

Alex Woronow

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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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Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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	10575080
PixInsight job	UOD3GW627PTMPFTJ2YREECO9L9ZKEB89
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h21m22s.400
RA (top/left)	00h17m09s.663
RA (top/right)	00h25m38s.563
RA (bottom/right)	00h25m41s.224
RA (bottom/left)	00h16m58s.433

Dec (center)	+61°47′18″.92
Dec (top/left)	+61°22′31″.64
Dec (top/right)	+61°23′06″.75
Dec (bottom/right)	+62°11′36″.80
Dec (bottom/left)	+62°10′59″.99

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SH2-173: With Several Dark-Nebulae

SH2-173: With Several Dark-Nebulae

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SH2-173: With Several Dark-Nebulae

SH2-173: With Several Dark-Nebulae

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