I had a clear night among very few these last weeks and thought that I would collect data on these two galaxy clusters.  Abell 2197 and Abell 2199.  These two distant galaxy groupings are very much the same distance from us, when using red shift information from individual galaxies within the groups.  The distances as marked on Revision D are both at ~420 million light years.  My guess is that these two are aligned very closely along one of the many large filaments, that largely hold the total mass of the Universe within a complex webwork, that reside within the vast mostly empy voids.  I have not researched how these galaxies relate to our local group.  

Presented here is the starred version of this field.  Most typically as starred images here on AB and elsewhere, this is no different, though I admit that I have done a very significant star reduction just to make some of the galaxies in the field show up at all.  This is a most unexciting field.  (I take @Gary Imm's assessment as the expert in reference here, by his comments on these same objects.)   It also does not help that my integration time is really starved for light at under 5 hrs.  I tried to enhance these galaxies, but did not succeed while keeping to my standard of creating something that is believable.  I did however stick to my standard of being able to see the background completely, the myriad of faint distant galaxies (the ones available at such short integration times), and the clusters' members.  I had thought that I might first collect 2-3X the time on this field, but time is short and I feared that no amount of time was going to be rewarding on this target.  I also do not intend to come back to this.  While my field and focal length used here cannot do justice to the numerous individual galaxies, I do believe that a long RC or Edge would find a number of fine individual or small grouping targets.  In particular, PGC 214503, the tight grouping at the center of 2199, PGC 58227, and 58296, all within the bounds of Abell 2199.  Affiliated with Abell 2197 are: PGC 58135 (appears to have a prominent ring), PGC 58149, and PGC 58215 (bright and highly irregular), among a few others that look nice.

Fact is, while visually uninteresting, what piqued my imagination was looking for the Red Shifts of these galaxies and discovering the many background galaxies at much greater distances.  This is not that well seen here, but it did give me a reason to produce an accurate starless version of this field.  So I produced a Extragalactic Travelers's view of this field to highlight the many galaxies seen, even at this integration time.  It is the mouse over image for this presentation.  Because Star Exterminator removes most if not all these smaller galaxies, this required a great deal of work.  In fact, inexplicably, SXT also removed some of the rather bright and obvious galaxies that are part of these clusters.  And it continues to remove stellar cores of some of the nicer spiral galaxies, especially the edge on ones.  

Back to Red Shift.  I found that there were a fair number of galaxies that I could see that were 2X or more times distant (1 billion LY) than the members of the two front clusters.  Something ofter reported here on AB.  Some of these were evidently themselves in galactic clusters.  I show three in Revision D.  Finding these in Aladin you can see on Rev. D the distances of the members of these clusters.  2 of these clusters, ACO 2187 & 2196 are +/- 2 GLy distant, with members having very close red shift values.  There are others that are evident that I did not highlight because I could find no information on them.  Another gouping, is seen hidden behind the tight central cluster of Abell 2199.  For this grouping, I just happened on a number of galaxies with consistent red shifts that suggest distances of ~5 GLy.  But I saw no official designation as a member of a known cluster. 

Regarding designations, the ACO designation appears to come from the latest galaxy cluster cataloging effort currently underway.  If interested see the Astrophysical Journal article on the current effort of identifying distant galaxy clusters using Planck microwave imaging data.  The effort has validated 1334 sources, with 319 remaining.  The catalog is named UPCluster-SZ.  This work is supposed to basically supercede that work on the Redmapper catalog as described in my post

The NGC4725 Family in the Foreground of The Universe - An Extragalactic View
or so the authors of this recent work say...