Revision B - Full Field of View Image - with crop mouse-over
Revision C - Full Field Starless Image with stars mouse-over
Revision D - Annotated Image with Full field image mouse-over

The predominant galaxies - the NGC 4411 pair (NGC 4411a, 4411b) are beautiful low surface brightness, face-on galaxies that spiral in opposite directions. They range from 45 to 73 million light years by redshift estimate (depending on reference - 3K CMB or Virgo infall). Tully- Fisher estimates are similarly varied. For NGC 4411a and 4411b redshifts are similar (0.004263, 0.004243 respectively); helio radial velocities are similar (1,278, 1,272 km/s respectively). It would seem they are in proximity to one another. However, there are no signs of in-structure distortion or tidal streams. Internet searches indicate a general consensus that these two galaxies are only optically aligned as a pair but are not interacting.

The NGC 4410 galaxy group is in the top of the image. It is notable for its tidal stream of stars (bridges) between the galaxies. On the right is NGC 4410 and its close pair PGC 40607 (NGC 4410B). Next and to the left is IC 790 (NGC 441C). Finally, furthest left is PGC 40736 (LEDA 40736, NGC 4410D). Their distances are similar - between 326 to 359 million light years by redshift estimate. Several articles present studies of the NGC 4410 group (and these four of ten total group members). It is believed their interaction is the result of spiral mergers that are transitioning to an elliptical. NGC 4410 'a' and 'b' in particular show evidence of a remnant spiral arm. Grana, Perez et al. conclude 'a' and 'b' are well into merger and eventually 'c' and 'd' will like join into the resulting product.

Abell 1541 (ACO 1541) is seen in the full field of view images (Rev B, Rev C and Rev D - annotation). The cluster's core area takes up most of the left part of these images - some cluster members lay outside of the image field. The cluster is centered about 1,248 million light years distant by redshift estimate. Abell 1541 is a rich cluster - in Abell's catalog it is designated class 1 in richness. Two of the brightest galaxy structures in Abell 1541 are the galaxy PGC94216 and the tight galaxy pair [WLH2009] 533. Abell 1541 cluster members have about a 9% wavelength stretch due to their distance / redshift - so members are generally recognized by their reddening color. The starless mouse-over gives a better indication of of these distant galaxies.

Many other background galaxies are also seen more easily in the starless mouse-over (isolated from the Milky Way galaxy stars). There are numerous Quasars as well - the furthest is SDSS J122604.74+085341.0 with a light travel time (Lookback) of 10.75 billion years and redshift of 2.234. These objects, information, and some of the brighter stars are identified in theannotated image.

Website links to pan and zoom with Navigation Pane (upper right) and true convenient full screen view (upper left buttons):
Full Field of View Image
Annotated Image