Markarian's Chain Mosaic (Mau_Bard)

Markarian's Chain Mosaic

As I write (beginning of February 2023) the weather in Vienna has now been cloudy since the beginning of last November. This long period of bad weather is significantly longer then the previous years. The positive side of that is that, as many others friends here in AB, I am processing all the residual image backlog.
This two images of the famous Makarian's Chain, assembled here as a mosaic, were in the drawer since March 2022. Mosaic processing is always an headache for me, this time though I went through it more easily than usual.

*

Markarian's Chain is a stretch of galaxies that forms part of the Virgo Cluster. When viewed from Earth, the galaxies lie along a smoothly curved line. Charles Messier first discovered two of the galaxies, M84 and M86, in 1781. The other galaxies seen in the chain were discovered by William Herschel and are now known primarily by their catalog numbers in John Louis Emil Dreyer's New General Catalogue, published in 1888. It was ultimately named after the Armenian Astronomer, Benjamin Markarian, who discovered their common motion in the early 1960s. Member galaxies include M84 (NGC 4374), M86 (NGC 4406), NGC 4477, NGC 4473, NGC 4461, NGC 4458, NGC 4438 and NGC 4435 (the last two in association form Arp 120). At least seven galaxies in the chain appear to move coherently, although others appear to be superposed by chance.
Near the center there appear the pair of interacting galaxies NGC 4438 and NGC 4435, about 50 million light-years away, known to some as Markarian's Eyes.

Edited text from Wikipedia.

Final
Original
B
D

B

Title: Closeup: Arp 120 - Makarian's Eyes

Uploaded: ...

D

Title: Annotated

Uploaded: ...

Austria Astrophotography
ZWO ASI 2600MC PRO
GHS Made a Substantial Difference
Reflecting Telescope Group
Suburban Astrophotography
Musical Imagers
N.I.N.A. Users
Imagers of Italy
Cooled Color Cams
PixInsight Addicts
Imaged with N.I.N.A.
Light Polluted skies
Optolong L-Pro filter
Broadband under Bortle 7/8/9

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	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

	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

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	7101902
PixInsight job	6084XGK702WS6WJIT1AGAGYE08W0U971
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h27m49s.301
RA (top/left)	12h31m55s.941
RA (top/right)	12h23m44s.171
RA (bottom/right)	12h23m43s.986
RA (bottom/left)	12h31m52s.262

Dec (center)	+13°06′50″.39
Dec (top/left)	+13°47′16″.77
Dec (top/right)	+13°48′00″.56
Dec (bottom/right)	+12°25′58″.88
Dec (bottom/left)	+12°25′17″.44

Image Index:

Contribution Index (beta):