M81 (JohnRFreeman)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · M 81 · NGC 3031

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M81

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M81

I'm continuing to work on improving the baffling system that I've made for inside of my primary mirror baffle tube. It looks like it's reduced nearly all of the off-axis light pollution from my image.
I use two stacked filter wheels. One is a 2" filter wheel using an L-Pro, the other is a 36mm filter wheel for my channels. I do this to manage light pollution in my Bortle 8 city site. Why use a filter wheel? Because sometimes you want to shoot something that you can catch a better luminance through an L-eXtreme but if on a filter drawer, you'll have to go back outside and change it manually. Plus, keeping it all enclosed keeps dust out.
The lower left corner artifact is a little worrying. Especially since it doesn't show up after the flip. I think it might be a function of the security light right behind my setup only entering from one side. I'll need to investigate further.
All images taken over four nights starting on 20220129. Best 61 frames of around 90 each channel used for stacking.

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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.
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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	5468762
PixInsight job	RRJU6G1QQRHYWT4ANN04PO3LRK1L6Q52
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h55m42s.166
RA (top/left)	09h54m09s.650
RA (top/right)	09h54m22s.910
RA (bottom/right)	09h57m13s.240
RA (bottom/left)	09h57m04s.320

Dec (center)	+69°03′55″.40
Dec (top/left)	+69°15′25″.59
Dec (top/right)	+68°51′42″.99
Dec (bottom/right)	+68°52′21″.14
Dec (bottom/left)	+69°16′05″.59

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