First, Muscovy was considered Asian by Western Europeans at the time...what time? Are you referring to the time when Western Europeans thought the East Indies could be reached by sailing across the Atlantic, with nothing in between? Given the geographical knowledge of the world at the time, Russia by way of comparision to Western Europe could indeed be considered Asian and/or exotic but keep in mind that for much of Europe's history, there were only 3 continents even known.
You will have to excuse me as I will respond in greater detail in a day or so.