Pictured here is the TEPCE cubesat captured by @mattdieterich and Nick Dunkel from ObsTech in Chile. They used a CDK24 on the L-600 to track the fast moving Low-Earth orbit satellite.
TEPCE is a tethered spacecraft built by U.S. NRL (Navel Research Laboratory), Washington D.C. to demonstrate electrodynamic propulsion in space. Electrodynamic propulsion holds the promise of limitless propulsion for maneuvering of spacecraft without using expendable fuel. The spacecraft, in its orbital configuration, consists of two CubeSat end masses attached to the end of 1 km of electrically conducting tether.
Electrodynamic propulsion works on electromagnetic principles similar to an electric motor. The magnetic field in an electric motor attracts an electric current that flows through the windings of the armature causing the armature to spin. In space, the Earth has a naturally occurring magnetic field and for TEPCE, the tether wire serves the purpose of the armature. By inducing an electric current to flow along the tether, a mutual attraction between the Earth's magnetic field and the tether will occur. This electromagnetic attraction can propel TEPCE to higher altitudes or to change the orientation of its orbit.
(Source: Earth Observation Portal). - 34 minutes ago