AJ10-190 Orbital Maneuvering System Engine
Exact Aerojet Rocketdyne AJ10-190 orbital maneuvering system engine (OMS-E) variant, a hypergolic liquid rocket engine using MMH/MON propellants. NASA identifies it as Orion’s main engine, built by Aerojet Rocketdyne, providing 6,000 lbf (26.69 kN) thrust for major in-space maneuvers; its existing Orion installation and active status are preserved.
Identity
- Aliases
- OMS-EOrion main engine
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- AJ10-190 Orbital Maneuvering System Engine
- Status
- active
Details
- Description
- Exact Aerojet Rocketdyne AJ10-190 orbital maneuvering system engine (OMS-E) variant, a hypergolic liquid rocket engine using MMH/MON propellants. NASA identifies it as Orion’s main engine, built by Aerojet Rocketdyne, providing 6,000 lbf (26.69 kN) thrust for major in-space maneuvers; its existing Orion installation and active status are preserved.
- Developers
- Family
- Manufacturers
- Propellants
- monomethyl hydrazinemixed oxides of nitrogen
- Rocket Specs
- Cycle
- pressure-fed
- Vacuum Thrust Kn
- 26.69
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 08:12:19 UTC
- Updated Time
- August 23, 2026 at 21:21:46 UTC
- Image
- Download
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- NASA identifies the Orion OMS-E as an Aerojet Rocketdyne-built main engine using monomethyl hydrazine and oxides of nitrogen, providing 6,000 lbf thrust; 6,000 lbf is normalized to 26.69 kN in rocketSpecs. NASA also records that the first-mission engine was a repurposed Space Shuttle OMS engine.
- Publisher
- National Aeronautics and Space Administration
- Title
- Fired Up: Engines and Motors Put Artemis Mission in Motion