The FLOCK 4Y-19 satellite, also known as Flock 4y-19, is a CubeSat (3U) technology demonstration spacecraft manufactured by PLAN and owned by the same entity. It was launched on January 3, 2023, from Launch Complex 40 at Cape Canaveral Air Force Station using a Falcon 9 launch vehicle. The satellite measures 0.3 meters in length, 0.1 meters in diameter, and has a span of 0.3 meters. It weighs 5.7 kilograms both dry and at launch. Equipped with PS0, PS1, or PS2 imaging payload (Dove 24a9), it is powered by solar cells and batteries. Its shape consists of a box with two panels. The expected operational lifetime varies between approximately one year for an ISS orbit and 2-3 years in Sun-Synchronous Orbit (SSO).