M81 and friends (Michael Timm)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · M 81 · M 82 · NGC 3031 · NGC 3034 · NGC 3077 · PGC 2719634 · PGC 2720796 · PGC 2721118 · PGC 2722319 · PGC 2724146 · PGC 2725421 · PGC 2726822 · PGC 2727315 · PGC 2728713 · PGC 2728721 · PGC 2730097 · PGC 2730379 · PGC 2730409 · PGC 2730709 · PGC 2730975 · PGC 2731294 · PGC 2731756 · PGC 2732102 · PGC 2732338 · PGC 2732720 · PGC 2732797 · PGC 2732888 · PGC 2733060 · And 32 more.

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M81 and friends

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M81 and friends

This is a part of the M81-group, which consists of over 60 galaxies, bound by gravitational force. The whole group spans about 40° x 20°, so even with my widefield-setup i can show only a part of it. The group is dominated by M81. Interestingly, M82 is only the fifth biggest member (after M81, NGC 2403, NGC 4236 and IC 2574). The M81-group is one of the nearest neighbours of our local group.

The image was taken under a very bright moon with good seeing. So autoguiding worked quite well, but the distance between the famous Riccardi-Reducer and the CCD-chip was not exact. So i imaged with an effecive focal length of about 458 mm and not 450 mm. Sadly you can see the curvated field, because the RicardiReducer is very sensitive when it comes to distances :-( In my original processing i was not able to kill all hotpixels, but after a reedit and tweaking parameters i could get rid of them :-) Version B is also a bit contrast-enhanced.

Original
Final
B

B

Description: Reedited (without hotpixel).

Uploaded: ...

The OSC Club (One Shot Camera)
The refractors!
"Nordish by nature"
ZWO ASI 294MC PRO
Cooled Color Cams

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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.
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	3391288
PixInsight job	NRVNXB27UM5TZKZC0IWGE88W8IE3G186
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h56m30s.93
RA (top/left)	09h47m33s.63
RA (top/right)	09h48m26s.25
RA (bottom/right)	10h04m34s.72
RA (bottom/left)	10h05m28s.40

Dec (center)	+69°21′39″.2
Dec (top/left)	+70°29′14″.0
Dec (top/right)	+68°12′32″.4
Dec (bottom/right)	+68°12′30″.6
Dec (bottom/left)	+70°29′12″.5

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M81 and friends

M81 and friends

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M81 and friends

M81 and friends

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Description

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Sky plot

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In these public groups

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