COSMOS 2543 (also known as Kosmos-2543) is a satellite launched on November 25, 2019, from the Plesetsk Cosmodrome LC43/4 launch pad using the Soyuz-2-1V launch vehicle. The spacecraft, with the OBJECT_ID 2019-079D and NORAD_CAT_ID 44835, is part of the Bus Nivelir series manufactured by TSKHM for technology and amateur communication purposes. It has dimensions of approximately 1 meter in length, a diameter of 0.4 meters, and a span of 1 meter with a hexagonal cylindrical shape augmented with antennas (Hex Cyl + Ant). The satellite weighs around 100 kilograms both at launch and dry mass. Its power system consists of solar cells complemented by batteries. TSKHM is the owner of this satellite, which carries the Nivelir No. 6 payload for technology demonstration and amateur communication services.