In 1987, the Zenith Star prototype space combat satellite prototype, using the Alpha laser, was announced by President Bush. The launch vehicle would be the Barbarian. Zenith Star weighed 39.4 metric tons, and was to be launched at one time by a Barbarian clustered launch vehicle or in two elements aboard a Titan 4.

Mass: 39,400 kg (86,800 lb). Associated Launch Vehicle: Barbarian MM.