This is a Luna 2 pin badge celebrating the successful launch of the probe and featuring the rocket blasting towards the surface of the Moon and the date of the mission 12-14 September 1959.
The spacecraft also carried Soviet pennants. Two of them, located in the spacecraft, were sphere-shaped, with the surface covered by identical pentagonal elements. In the center was an explosive charge designed to shatter the sphere, sending the pentagonal shields in all directions.