Antares A-ONE
 The Antares A-ONE is the maiden flight of Orbital Sciences' Antares rocket with a boilerplate payload the Cygnus Mass Simulator which was launched April 21 2013. It was launched from Pad 0A at the Mid-Atlantic Regional Spaceport (MARS) on Wallops Island Virginia USA. The boilerplate payload simulates the mass of the Cygnus cargo spacecraft.