Alpha Site is an system without a star or a normal jump point; it requires the Transverse Jump ability. It is located approximately on the right upper corner of Hybrasil Star System. This "system" consists of one small irradiated planet with a magnetic field. In the star system there is one Ziggurat class ship that is always recoverable after battle.
Additionally, the system contains a "hidden" shielded cargo container guarded by a minor force of Remnants. The container is located approximately halfway between the irradiated planet and the "northeast" corner of the system map and contains several advanced weapons otherwise only available in limited amounts from endgame enemy encounters. The Neutrino Detector is very helpful in locating this hidden cache, which can be acquired very early if the player fleet is capable of defeating the (relatively) minor force guarding it.