[Utah-astronomy] New photo and request for help

Hi Friends, I just posted a Mars photo on my gallery. It was taken from my SLC backyard last night. I am writing a story, and want to use the photo in it. Can anyone please give me an explanation for the lopsidedness and the blue crescent at the bottom? I notice that Don's recent Mars images have the same effect, so I don't think it's a telescope error. Thanks very much, Joe