As promised, I've been working a bit at a time through the Dunlop objects.
I thought the first one to upload to here is four of them that make up the Grus Quartet,
Dunlop 475, 476 & 477 (NGC 7552, 7582, 7590 & 7599).
While there are only three designated Dunlop numblers, NGC 7590 & 7599 are for some reason given the same Dunlop number, 477.
These four galaxies are so close to each other that there is some thinking that they are interacting. Infact, some CSIRO research has some
very strong evidence for this.
This quartet I call the "dinosaur killers". This is because the average distance to them is approximately the same as that considered how long ago the dinosaurs became extinct, 65 million years ago. In other words, when your eye/s gaze upon the photons of this quartet, the age of these photons is from when the dinosaurs were in their death throes.
This quartet lies within one degree of each other. In my 17.5", with a 30mm 68deg. EP they just all fit in the FOV.
In this sketch, Dunlop 475 is the one on the far right, and 477 are the two top left galaxies.