Star like object moving from left to right, a part of the object detached and moved directly downwards at 90 degrees from the main objeI was in my back garden at 00:03 on May 11th having a cigarette before going to bed. I was facing North East looking at the stars in the clear sky when an object just appeared in view, I can only describe it looking like a star in the distance but several times brighter than anything else in view, the object was moving from left to right and moving perfectly horizontally. The object appeared to be a long way off but it wasn't particularly high in the sky. What made it so unusual was that a part of the object which was also glowing bright white and approximately 25% in size to the main object, appeared to fall and move directly downwards at 90 degrees from the larger object, whilst the larger part continued moving to the right until my view was obscured by a tree at the end of my neighbours garden. I didn't see it reappear at the other side of the tree.