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That was just example, I don't have any "RS" object in the Find Object window (F3). :'(
Find Object window lists known catalog objects or addons objects, but as I said if you write a known RS number it will select it for you.
And if you don't have a particular RS object number, then the only way to find some, apart for clicking on a random star on the screen, again it's the Star Browser
Maybe we should also mention the fact that "RS" objects are not real objects, but procedurally generated by the program on the fly (RS = Random Star).