The two-stage vehicle stands 128 feet tall and measures eight feet in diameter, with a 10-foot payload fairing.
At T-0, the first-stage engine ignites along with the rocket’s three solid-rocket boosters. Its propellants are LOX, which is being loaded now, and a highly refined kerosene called RP-1, which was loaded previously. The second stage runs on hypergolic propellants that ignite on contact. Those propellants are already on board.