USA 437, also known as Starshield 4-17, is a satellite operated by NROC (National Reconnaissance Office) and was launched on October 24, 2024, from the AFWTR SLC4E launch pad using a Falcon 9 rocket. The satellite has dimensions of 0.3 meters in length, 4.1 meters in diameter, and spans 29 meters when its components are deployed. It has a dry mass of 750 kg and a launch mass of 800 kg. Equipped with deployable solar arrays for power generation, USA 437's mission is unknown but suspected to involve imaging or SIGINT (Signals Intelligence). The satellite features a configuration described as a "Starshield bus" with a shape characterized by a box structure and panels.