I was outside in my court yard having a cigarette with my dog and noticed a light that I have not seen coming from a plane or a helicopter before. I can only describe it as Ultra violet, very bright with a red pulsing light which was smaller, as the ultra violet light was constant. It came into my field of vision from behind trees in my community moving at a very fast pace, moving SE and ascending. when at the time it went just behind cloud cover for a moment then emerged and hovered over the middle star on Orion's belt (only ref point I had at the time) it hovered for about 1.5 min's and then proceeded to descend and curve around, moving NW towards the everglades. at the time this was happening another plane was in the area as I live in Delray we have a lot of air traffic with fort Lauderdale airport, Miami international and palm beach international airports right around us. I know this was not a plane or helicopter I know what the look like. very strange. I waited to see if I could see it again for about 5 min's but I could not see it. The color of the light I can describe it as when black light hits white, it was neon violet.