Penthesilea brought in a contingent of Amazons to Troy to fight against the Greeks. Penthesilea was a queen of the Amazons from the Greek mythology. She was revered for her courage and wisdom and for her mastery in weapons. She was killed by Achilles.
I think it is 50°. If 130 is also the angle of elevation, then it is also the angle of depression. So the two angles up there (depression and x) equal 180 so - 130 = 50.