Northrop Grumman’s Minotaur 1 rocket launches three classified NRO payloads

Minotaur boosters are made with refurbished solid rocket motors from decommissioned Minuteman 3 intercontinental ballistic missiles

WASHINGTON — A Northrop Grumman Minotaur 1 four-stage solid fuel rocket launched three national security payloads for the National Reconnaissance Office on June 15 at 9:35 a.m. Eastern from the Mid-Atlantic Regional Spaceport at NASA’s Wallops Flight Facility in Virginia.

The mission named NROL-111 was delayed by more than two and a half hours because of weather. Approximately one minute after liftoff the first stage motor separated from the second stage motor. 

Minotaur boosters are made with refurbished solid rocket motors from decommissioned Minuteman 3 intercontinental ballistic missiles (ICBM).

The second stage separated about two minutes and 20 seconds after liftoff. Shorty after, NASA ended the webcast at the request of the NRO.

NROL-111 is a classified mission in low Earth orbit and the NRO did not disclose any details of the payloads. The logo shows a flying wild boar in aviator gear. The NRO said he three stars represent the mission’s three payloads developed by the agency. 

The Minotaur 1 is a small rocket that can launch payloads up to 580 kilograms to low Earth orbit.

This was Minotaur 1’s first launch for the NRO, a U.S. intelligence agency that builds and operates the nation’s spy satellites. 

The Minotaur 1 has completed 12 successful missions since it was introduced in 2000. NROL-111 was the NRO’s second launch of 2021 and the agency’s second mission launched from Wallops. Last year the NROL-129 mission launched on a Northrop Grumman Minotaur 4 rocket, a larger vehicle than the Minotaur 1. 

Minotaur 1 has refurbished ICBM motors in its first and second stages. The third and and fourth stages are commercially produced motors that also are used in the company’s air-launched Pegasus XL rocket. 

The launch was awarded under the U.S. Space Force’s Rocket Systems Launch Program’s Orbital/Suborbital Program (OSP)-3. The Rocket Systems Launch Program was created by the Pentagon in 1972 to convert surplus ICBMs into small launch vehicles. 

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