20 May 2015, 15:05 UTC
OTV-4 (X-37B) (USA 261) ( AFSPC-5) & ULTRASat cubesat deployer

Atlas V 501 launched the AFSPC-5 mission carrying the U.S. Air Force's X-37B Orbital Test Vehicle on its fourth flight (OTV-4), along with The Planetary Society's LightSail solar-sail demonstrator and a batch of Department of Defense CubeSats.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 7.1 T (est.)
- Flight
- 6th
- of 8 Atlas V 501 flights
- Date and time
- 20 May 2015, 15:05 UTC
- Rocket
- Atlas V 501
- Builder
- ULA
- Launch site
- Space Launch Complex 41, Cape Canaveral SFS, FL, USA
- Payload
- Government/Top Secret
- International designator
- 2015-025
- Launches in 2015
- 27th of 87
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
View satellites in Space Atlas