Bright UFO spotted over a parc in Edinburgh

On June 5, 2016, several persons were in a park in Edinburgh (Scotland) when they have spotted a bright and white UFO in the sky. What is it?

Witness report:

We were in a park when we observed the object in the sky. It was not like and airplane or something similar. We thought that maybe would be a satellite but we were very suspicious about the object. It looked very distant and reflective, not very easy to see. We had the feeling that was something weird and tried to take some pictures with a camera (60mm lens). For our surprise, the camera was able to catch it (We had to use the trees as a reference to take the picture and also to be able to find the little dot later).