SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard) (Kai Yang)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

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SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

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SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

This image is taken from my backyard observatory (Skyshed POD) located in the white zone of Silicon Valley, California.
SH2-174 is a really faint target, cannot see much from a single frame.

30min Ha single frame

Note from https://www.aapod2.com/blog/sh2-174
Sh2-174 is one of the oldest planetary nebulae that is more unusual because the white dwarf is not in the center of the nebula.
This asymmetry is due to the interaction of the planetary nebula with the surrounding interstellar medium.

Screen Shot 2024-02-03 at 7.17.54 PM.png

This image takes 30 hours of Ha data (3nm filter), 24 hours of O3 data (3nm filter), and 25 hours of S2 data (3nm filter).
Several hours of RGB for star colors.

Process with PI.
R/B/G --> ABE --> ChannelCombine --> ABE
Ha + O3 + RGB --> NBRGBCombine --> ABE --> BTX --> Stretch* --> NTX --> Stretch

Light Polluted skies
SF Bay Area Imagers
Images of Taiwan

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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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.

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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	Basic success
Started	...
Astrometry.net job	9156460
PixInsight job	n/a
PixInsight queue size	n/a
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SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

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SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

SH2-174 (80+ Hr Narrowband from Silicon Valley Backyard)

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