USA 453, also known as Starshield 5-13, is a satellite operated by NROC and manufactured by SPXS. It was launched on December 17, 2024, from AFWTR SLC4E using a Falcon 9 launch vehicle. The satellite has dimensions of 0.3 meters in length, 4.1 meters in diameter, and a span of 29 meters. Its dry mass is 750 kilograms with a launch mass of 800 kilograms. Equipped with deployable solar arrays for power, the purpose of USA 453 is unknown but suspected to be related to imaging or SIGINT operations. The satellite's shape is described as "Box + pan," and it utilizes a Starshield bus configuration.