My goal is to learn about an example of a Dwarf Spheroidal or a Dwarf Irregular Galaxy which is not a Satellite / Companion Galaxy (or is at least 500 000 L.y. away from another Galaxy), and doesn't measure more than 500 Light years in Diameter.
I must say that merely learning whether such Galaxies exist or not, would also be extremely helpful.
Another great alternative would be a Galaxy of any shape as long as it's less than 500 L.y. in Diameter and at least 500 000 L.y. away from another Galaxy.
The perfect example however would be a Dwarf Spheroidal or a Dwarf Irregular below 500 L.y. in Diameter, at about the average distance away from another Galaxy.
I found a few lists of Dwarf Galaxies, but they are lacking details regarding the sizes.
Any help would be greatly appreciated. Thank you.