NGC281 (wadeh237)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD236521 · HD236526 · HD236589 · HD236593 · HD4266 · HD4647 · HD5005 · HD5032 · HD5396 · HD5553 · IC 1590 · LBN 605 · LBN 611 · LBN 615 · LBN 616 · LBN 621 · NGC 281 · Sh2-184

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NGC281

Powered byPixInsight

NGC281

NGC281 - The PacMan Nebula

This is a simple test shot on a new (to me) mount. I purchased an AP1100GTO mount used. My intent for this mount is primarily visual use, but there was some setup I needed to do that involved a camera. I needed to calibrate the polar alignment scope, which requires an initial drift alignment. I used PEMPro and drift aligned the azimuth in the traditional method. To align the altitude setting, I pointed the scope at the zenith, just west of the meridian and then adjusted to minimize RA drift. Astro-Physics calls this the RA Drift Alignment Method. It is intended to provide minimal drift in both axes near the zenith. I also used PEMPro to program the mount's periodic error correction.

Since I already had a camera on the mount, and it was still pretty early in the evening, I figured that I would take a test image.

This was done with my Stellarvue SV80ST with an ASI1600 and a 3nm Astrodon Ha filter. It is 30x300 seconds unguided. Since I was interested in the mount's native performance, this is done with nothing more than a simple alignment and periodic error correction enabled. There is no guiding and no pointing/tracking model.

For processing, I calibrated and combined the images in CCDStack. I then used PixInsight to remove a gradient with DynamicBackgroundExtraction and then did a simple HistogramTransformation. No other processing was done, since the intent was to see how the mount works.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

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
Traveller
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	1856045
PixInsight job	TARFKKPDQ1RD4KJOZH6DN7GDYEIE99G4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h53m00s.65
RA (top/left)	01h00m30s.71
RA (top/right)	00h44m58s.69
RA (bottom/right)	00h45m50s.43
RA (bottom/left)	01h00m43s.91

Dec (center)	+56°35′06″.5
Dec (top/left)	+57°24′45″.3
Dec (top/right)	+57°18′40″.9
Dec (bottom/right)	+55°43′52″.7
Dec (bottom/left)	+55°49′39″.4

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Contribution Index (beta):

NGC281

NGC281

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Description

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Sky plot

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Image Index:

Contribution Index (beta):

NGC281

NGC281

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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