The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle. When it was in service from 2004 to 2024, it was the largest type in the Delta IV family and was the world's second highest-capacity rocket in operation, behind SpaceX's Falcon Heavy rocket and closely followed by CNSA's Long March 5 rocket. It was manufactured by United Launch Alliance and was first launched in December 2004 and was retired after its last flight on April 9, 2024.
Launch statistics It had 11 launches from Florida, and 5 from Vandenberg, California.
Launch history + Flight Date Payload Mass Launch site Outcome 1 December 21, 2004 DemoSat, Sparkie / 3CS-1 and Ralphie / 3CS-2 Cape Canaveral, SLC-37B 2 November 11, 2007 DSP-23 Cape Canaveral, SLC-37B 3 January 18, 2009 Orion 6 / Mentor 4 (USA-202 / NROL-26) Cape Canaveral, SLC-37B 4 November 21, 2010 Orion 7 / Mentor 5 (USA-223 / NROL-32) Cape Canaveral, SLC-37B 5 January 20, 2011 KH-11 Kennen 15 (USA-224 / NROL-49) Vandenberg, SLC-6 6 June 29, 2012 Orion 8 / Mentor 6 (USA-237 / NROL-15) Cape Canaveral, SLC-37B 7 August 26, 2013 KH-11 Kennen 16 (USA-245 / NROL-65) Vandenberg, SLC-6 8 December 5, 2014 Orion Exploration Flight Test-1 (EFT-1) Cape Canaveral, SLC-37B 9 June 11, 2016 Orion 9 / Mentor 7 (USA-268 / NROL-37) Cape Canaveral, SLC-37B 10 August 12, 2018 Parker Solar Probe Cape Canaveral, SLC-37B 11 January 19, 2019 NROL-71 Vandenberg, SLC-6 12 December 11, 2020 Orion 10 / Mentor 8 (USA-268/ NROL-44) Cape Canaveral, SLC-37B 13 April 26, 2021 KH-11 Kennen 17 (NROL-82) Vandenberg, SLC-6 14 September 24, 2022 KH-11 Kennen 18 (NROL-91) Vandenberg, SLC-6 15 June 22, 2023 Orion 11 / Mentor 9 (NROL-68) Cape Canaveral, SLC-37B 16 April 9, 2024 Orion 12 / Mentor 10 (NROL-70) Cape Canaveral, SLC-37B
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