Minotaur I – Orbital Sciences Corporation Family: Minotaur Length: 19.21 meters Diameter: 1.67 meters Launch Mass: 36 Low Earth Orbit Capacity: 580 The Minotaur I was manufactured by Orbital Sciences Corporation with the first launch on 2000-01-27. Minotaur I has 3 successful launches and 0 failed launches with a total of 3 launches. The Minotaur I launch system is derived from converted Minuteman II ICBMs and is used to launch small satellites for the US Government. The first and second stages, taken directly from decommissioned Minuteman missiles, are mated to the Orion third and fourth stages taken from the Pegasus XL air-launched rocket family. An optional hydrazine-powered fifth stage called HAPS can be used.The Minotaur I launch system is derived from converted Minuteman II ICBMs and is used to launch small satellites for the US Government. The first and second stages, taken directly from decommissioned Minuteman missiles, are mated to the Orion third and fourth stages taken from the Pegasus XL air-launched rocket family. An optional hydrazine-powered fifth stage called HAPS can be used. Manufacturer Orbital Sciences Corporation is a Commercial USA entity that was founded in and is administered by . Orbital Sciences Corporation has 51 successful launches and 4 failed launches with a total of 55 launches.