Atlas V 421
Profile data last updated: 2026-08-15T20:08:04.839063+00:00 | 7531-09-02
Atlas V is an expendable launch system in the Atlas rocket family. It was formerly operated by Lockheed Martin and is now operated by United Launch Alliance (ULA), a joint venture with Boeing. Each Atlas V rocket uses a Russian-built RD-180 engine burning kerosene and liquid oxygen to power its first stage and an American-built RL10 engine burning liquid hydrogen and liquid oxygen to power its Centaur upper stage. The RD-180 engines are provided by RD Amross, while Aerojet Rocketdyne provides both the RL10 engines and the strap-on boosters used in some configurations. The 421 version uses a 4m wide fairing, 2 solid rocket boosters and one engine on the Centaur stage.
Specifications
Payload Capacity
Lifetime Launch Record
As reported by Launch Library 2 across this rocket's entire history, not just the launches tracked on this site.
Launches Tracked on This Site
| Mission | Date | Status |
|---|---|---|
| Atlas V 421 | SBIRS GEO-6 | Aug 04, 2022 10:29 UTC | Success |
| Atlas V 421 | SBIRS GEO-5 | May 18, 2021 17:37 UTC | Success |
| Atlas V 421 | NROL-52 | Oct 15, 2017 07:28 UTC | Success |
| Atlas V 421 | NROL-61 | Jul 28, 2016 12:37 UTC | Success |
| Atlas V 421 | Mexsat-2 (Morelos III) | Oct 02, 2015 10:28 UTC | Success |
| Atlas V 421 | MMS | Mar 13, 2015 02:44 UTC | Success |
| Atlas V 421 | WGS-2 | Apr 04, 2009 00:31 UTC | Success |
| Atlas V 421 | ICO G1 | Apr 14, 2008 20:12 UTC | Success |
| Atlas V 421 | WGS-1 | Oct 11, 2007 00:22 UTC | Success |