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 IV was primarily a launch vehicle for United States Air Force (USAF) military payloads, but was also used to launch a number of United States government non-military payloads and a single commercial satellite.

The Delta IV originally had two main versions which allowed the family to cover a range of payload sizes and masses: the Medium (which had four configurations) and Heavy. Since September 2019, only the Heavy remained active, with payloads that would previously fly on Medium moving to either the existing Atlas V or the forthcoming Vulcan. Retirement of the Delta IV occurred in 2024.

Delta IV vehicles were built in the ULA facility in Decatur, Alabama. Final assembly was completed at the launch site by ULA: at the horizontal integration facility for launches from SLC-37B pad at Cape Canaveral and in a similar facility for launches from SLC-6 pad at Vandenberg Air Force Base.

Launch statistics Launch outcome

Launch site

Vehicle

Launch history

+FlightDate / time (UTC)Launch sitePayloadRocketLaunch outcome120 November 2002Cape Canaveral, SLC-37BEutelsat W5Delta IV Medium211 March 2003Cape Canaveral, SLC-37BUSA-167 (DSCS-3 A3)Delta IV Medium329 August 2003Cape Canaveral, SLC-37BUSA-170 (DSCS-3 B6)Delta IV Medium421 December 2004Cape Canaveral, SLC-37BDemoSat, Sparkie / 3CS-1 and Ralphie / 3CS-2Delta IV Heavy524 May 2006Cape Canaveral, SLC-37BGOES-N (GOES-13)Delta IV Medium628 June 2006Vandenberg, SLC-6USA-184 (NROL-22)Delta IV Medium74 November 2006Vandenberg, SLC-6DMSP F17Delta IV Medium811 November 2007Cape Canaveral, SLC-37BDSP-23 Defense Support ProgramDelta IV Heavy918 January 2009Cape Canaveral, SLC-37BOrion 6 / Mentor 4 (USA-202 / NROL-26)Delta IV Heavy1027 June 2009Cape Canaveral, SLC-37BGOES-O (GOES-14)Delta IV Medium116 December 2009Cape Canaveral, SLC-37BUSA-211 (WGS-3)Delta IV Medium124 March 2010Cape Canaveral, SLC-37BGOES-P (GOES-15)Delta IV Medium1328 May 2010Cape Canaveral, SLC-37BUSA-213 (GPS IIF SV-1)Delta IV Medium1421 November 2010Cape Canaveral, SLC-37BOrion 7 / Mentor 5 (USA-223 / NROL-32)Delta IV Heavy1520 January 2011Vandenberg, SLC-6KH-11 Kennen 15 (USA-224 / NROL-49)Delta IV Heavy1611 March 2011Cape Canaveral, SLC-37BUSA-227 (NROL-27)Delta IV Medium1716 July 2011Cape Canaveral, SLC-37BUSA-232 (GPS IIF-2)Delta IV Medium1820 January 2012Cape Canaveral, SLC-37BUSA-233 (WGS-4)Delta IV Medium193 April 2012Vandenberg, SLC-6USA-234 (NROL-25)Delta IV Medium2029 June 2012Cape Canaveral, SLC-37BOrion 8 / Mentor 6 (USA-237 / NROL-15)Delta IV Heavy214 October 2012Cape Canaveral, SLC-37BUSA-239 (GPS IIF-3)Delta IV Medium2225 May 2013Cape Canaveral, SLC-37BUSA-243 (WGS-5)Delta IV Medium238 August 2013Cape Canaveral, SLC-37BUSA-244 (WGS-6)Delta IV Medium2426 August 2013Vandenberg, SLC-6KH-11 Kennen 16 (USA-245 / NROL-65)Delta IV Heavy2521 February 2014Cape Canaveral, SLC-37BUSA-248 (GPS IIF-5)Delta IV Medium2617 May 2014Cape Canaveral, SLC-37BUSA-251 (GPS IIF-6)Delta IV Medium2728 July 2014Cape Canaveral, SLC-37BUSA 253-255 (AFSPC-4 (GSSAP #1/#2/ANGELS))Delta IV Medium285 December 2014Cape Canaveral, SLC-37BOrion Exploration Flight Test-1 (EFT-1)Delta IV Heavy2925 March 2015Cape Canaveral, SLC-37BUSA-260 (GPS IIF-9)Delta IV Medium3024 July 2015Cape Canaveral, SLC-37BUSA-263 (WGS-7)Delta IV Medium3110 February 2016Vandenberg, SLC-6USA-267 (NROL-45)Delta IV Medium3211 June 2016Cape Canaveral, SLC-37BOrion 9 / Mentor 7 (USA-268 / NROL-37)Delta IV Heavy3319 August 2016Cape Canaveral, SLC-37BUSA-270/271 (AFSPC-6 (GSSAP #3/#4))Delta IV Medium347 December 2016Cape Canaveral, SLC-37BUSA-272 (WGS-8)Delta IV Medium3519 March 2017Cape Canaveral, SLC-37BUSA-275 (WGS-9)Delta IV Medium3612 January 2018Vandenberg, SLC-6USA-281 (NROL-47)Delta IV Medium3712 August 2018Cape Canaveral, SLC-37BParker Solar ProbeDelta IV Heavy3819 January 2019Vandenberg, SLC-6KH-11 Kennen 17 (NROL-71)Delta IV Heavy3916 March 2019Cape Canaveral, SLC-37BUSA-291 (WGS-10)Delta IV Medium4022 August 2019Cape Canaveral, SLC-37BUSA-293 (GPS III-2)Delta IV Medium4111 December 2020Cape Canaveral, SLC-37BOrion 10 / Mentor 8 (USA-268 / NROL-44) Delta IV Heavy4226 April 2021Vandenberg, SLC-6KH-11 Kennen 18 (NROL-82)Delta IV Heavy4324 September 2022Vandenberg, SLC-6KH-11 Kennen 18 (NROL-91)Delta IV Heavy4422 June 2023Cape Canaveral, SLC-37BOrion 11 / Mentor 9 (NROL-68)Delta IV Heavy459 April 2024Cape Canaveral, SLC-37BOrion 12 / Mentor 10 (NROL-70)Delta IV Heavy

Notes

References