M101 Pinwheel 2020+2021 (Brett Creider)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5471

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M101 Pinwheel 2020+2021

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M101 Pinwheel 2020+2021

Another Bortle 9, Dallas light pollution challenger approaches - M101 the Whirlpool Galaxy. A trillion stars, at least twice as many as our own Milky Way, and a short jump (galactically speaking) of 25 million light years from Earth.

This image is a combination of two imaging sessions...

The first being 53 x 120s sub exposures shot with a GSO RC6 purchased during lockdown 2020. It had an f/7 focal reducer with my trusty ZWO ASI294MC camera at the usual prescribed -10c / 200 gain settings and an Optolong L Pro filter.

The second session, last night, ended up with 45 x 120s sub exposures shot with a Celestron 9.25" SCT purchased originally for planets before I invested in Dallas DSO hunts some years ago. That scope has the ultimate setup for me, being an f/6.3 focal reducer, a Celestron off-axis guider, and a ZWO 174mm mini guide cam to match. It was also using the same ZWO ASI294MC as the RC6, but with a ZWO UV/IR cut filter.

One day I will need to move, or find a place to plant a remote observatory. It is fun to image from home, as challenging and convenient as it is, but there are thousands of targets I might never see if I can't get out of this city.

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	Basic success
Started	...
Astrometry.net job	4636871
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M101 Pinwheel 2020+2021

M101 Pinwheel 2020+2021

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M101 Pinwheel 2020+2021

M101 Pinwheel 2020+2021

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