Siren I was mapped and explored by the Fifth Expeditionary Fleet in YE 30. It was dismissed as a relatively worthless rocky planet until YE 42 when geological surveys found ruthenium and palladium deposits in rich quantities in the northern hemisphere of the planet. The Yugumo Corporation added automated extraction facilities in early YE 42.
Siren I has some interesting locations:
During the construction of the Nemesis Bastion, it was noted by engineers that there was an unknown alien crash site approximately three hundred kilometers West of the X-6 base entrance. No investigation was done at the time, the state of the vessel nor its contents are known. It does not fit any known configuration.