NGC 891 - The UFO Galaxy (wadeh237)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: HD14771 · NGC 891

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NGC 891 - The UFO Galaxy

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NGC 891 - The UFO Galaxy

This is NGC 891, an edge on spiral galaxy in Andromeda. It is sometimes called "The UFO Galaxy". I believe that you can also see an image of this galaxy in the closing credits of the original Outer Limits TV show.

I acquired the data for this image over 3 nights, from September 24 though 26, 2022 from our property just outside of Ellensburg, WA.

I used the data for this image for a live processing session at the 2/21/2023 meeting of the Seattle Astronomical Society's Astrophotography Special Interest Group. I prepared the data in advance by calibrating, and integrating it into master files for the Luminance, Red, Green and Blue channels. All the rest of the processing was done live over Zoom during the meeting to demonstrate using PixInsight and a few 3rd party plug-ins, such as the XTerminator tools by RC-Astro. The result that I am publishing here is where we ended up at the end of the meeting.

This is a pretty simple field, so there isn't a bunch of nebulosity to explore, etc., and there doesn't appear to be any IFN in the field. There are, however, many small and faint galaxies in the background and some of them turned out pretty nice.

The capture details are as follows:

Telescope: Astro-Physics AP130GTX @ F/6.3
Camera: QSI 690 wsg-8 with Astrodon Gen2 filters
Mount: Astro-Physics AP1600GTO-CP4-AE
Guiding: PHD2 with Starlight Xpress Ultrastar
Subs: 76x600 luminance, 26x300 red, 25x300 green, 26x300 blue

Processed in PixInsight.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	7228497
PixInsight job	PMSWSS6VHQFJ8Q2U06VPGCG25ZNFXIFB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h22m32s.642
RA (top/left)	02h24m42s.871
RA (top/right)	02h20m22s.549
RA (bottom/right)	02h20m23s.776
RA (bottom/left)	02h24m41s.659

Dec (center)	+42°20′41″.54
Dec (top/left)	+42°38′24″.20
Dec (top/right)	+42°38′25″.43
Dec (bottom/right)	+42°02′48″.49
Dec (bottom/left)	+42°02′48″.90

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NGC 891 - The UFO Galaxy

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