It's a sunny clear day, and the moon was visible over dayligth. I was watching the moon and observed a point blue initialy and aparentely following the usual approaching route to the airport. Then I note that its speed was not similar to the usual planes. It give me time to find a small monocular and with them I saw a traingular shape. totally different to a plane that with the visibility conditions would be seen clearly.Sure was not a plane due to it's shape, speed, flight path.