FLOCK 1B-12 is a CubeSat (3U) technology satellite manufactured by PLABS and owned by PLABS. It was launched on November 20, 1998, from the Mid-Atlantic Regional Spaceport (TYMSC), Pad 0A, using an Antares 120 launch vehicle. The satellite has dimensions of 0.3 meters in length and diameter, with a span of 0.3 meters. It carries either PS0, PS1, or PS2 imaging payloads as part of its equipment. FLOCK 1B-12's dry mass is 4.5 kg, the same as its launch mass. Its purpose is technology-oriented, and it operates on solar cells and batteries for power. The satellite has a shape described as "Box+2 pan" with a reflectivity (RCS) of 0.126. It was stabilized by March 5, 2015, and its expected lifetime varies from about one year in the ISS orbit to two to three years in SSO orbits.