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The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It had the highest capacity of any operational launch vehicle in the world after the retirement of the Space Shuttle in 2011 until the Falcon Heavy debuted in 2018, and it was the world's third highest-capacity launch vehicle in operation at the time of its retirement in 2024.
Delta IV was a group of five expendable launch systems in the Delta rocket family introduced in the early 2000s. Originally designed by Boeing 's Defense, Space and Security division for the Evolved Expendable Launch Vehicle (EELV) program, the Delta IV became a United Launch Alliance (ULA) product in 2006.
The Delta rocket family was a versatile range of American rocket-powered expendable launch systems that provided space launch capability in the United States from 1960 to 2024. Japan also launched license-built derivatives ( N-I , N-II , and H-I ) from 1975 to 1992.
This was also the first Delta IV launch contracted by the United Launch Alliance, a joint venture between Boeing and Lockheed Martin. The main payload was the 23rd and final Defense Support Program missile-warning satellite, DSP-23. Launch from Cape Canaveral occurred on 10 November 2007. [89] NROL-26 was the first Delta IV Heavy EELV launch ...
The Delta IV Heavy made its debut during a December 2004 demonstration flight from Launch Complex 37. Mission: ULA's last Delta IV Heavy triple-core rocket will launch on the NROL-70 national ...
Only use of Delta IV Heavy with Star 48BV third stage (9255H). Heliophysics; 8.5 solar radii (5.9 million km) perihelion. 381 15 September 2018, 13:02 Delta II 7420-10C VAFB SLC-2W: ICESat-2: 1,514 kg LEO: NASA: Success Final Delta II launch and final flight of a Thor-derived launch vehicle. 100th successful launch of a Delta II in a row.
Delta IV CBCs and DCSSs were integrated horizontally before being transported to the launchpad. The Delta IV Medium retired after the 22 August 2019 launch of a GPS-III satellite. The mission used a Delta IV M+(4,2) two SRBs, and a 4 m diameter DCSS and payload fairing, the final use of the 4 m fairing. [33] [34]
Mars rover, First Delta II Heavy launch (with GEM 46s used on the Delta III) 300 August 25, 2003 05:35 Delta II 7920H-9.5 CCAFS SLC-17B Spitzer Space Telescope (SIRTF) 851.5 kg Heliocentric: NASA: Success [25] Infra-red telescope, 300th Delta rocket mission, First Delta II Heavy launch without a third-stage motor 301 August 29, 2003 23:13 Delta ...