This Mars opposition you need about 200x to get a descent view and image size but seeing will also determine what you see. The polar caps are generally not difficult but they are seasonal and as one cap shrinks the other grows but at mid season both can be small. The north polar cap is quite visible at the moment. Best for Mars tomorrow morning is between 1am and 4am.
Mars will be almost double its current size in three oppositions from now (mid 2018).
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