Official Website: Northrop Grumman Promontory
source confidence: Medium status: Useful updated 2026-06-19
Summary
Northrop Grumman's Artemis program page describes the Promontory, Utah facility's role in manufacturing solid rocket boosters for NASA's Space Launch System. The parent company's space division site covers both the Artemis booster program and the broader solid-propulsion portfolio including the Sentinel ICBM.
Useful Claims
- The capture says Northrop Grumman manufactures the five-segment SLS boosters and gives a motor length of 153 feet; it does not contain the page's earlier claims about share of liftoff thrust or total thrust per booster.
- The capture describes Northrop Grumman's Artemis propulsion role and documents Promontory as the site of Orion abort-motor qualification tests.
- Earlier claims on this source page about a BOLE test, eight decades of Promontory history, Sentinel, workforce scale, and market concentration are not present in this capture and need their own sources.
Verbatim
"Northrop Grumman manufactures the five-segment solid rocket boosters for the NASA Space Launch System (SLS). These are the largest human-rated solid rocket boosters ever built for flight." — Artemis page, "Space Launch System Boosters"
"Each motor consists of five rocket motor segments, thrust vector control and an aft exit cone assembly; it is 153 feet long and 12 feet in diameter." — Artemis page, SLS booster specifications
"Northrop Grumman, along with NASA and Lockheed Martin, successfully completed qualification of the abort motor with three ground test firings of the abort motor at the company's Promontory, Utah, facility." — Artemis page, Orion Launch Abort Motor
"Under Artemis, NASA will send astronauts on increasingly difficult missions to explore more of the Moon for scientific discovery, economic benefits, and to build on our foundation for the first crewed missions to Mars." — Artemis page, program overview
Reliability Notes
This capture does not support the earlier thrust-share, per-booster thrust, BOLE, site-history, Sentinel, workforce, or market-concentration claims. Those claims need separate artifacts.
This is an official corporate source for a publicly traded defense prime (NYSE: NOC). Product and mission descriptions are reliable for understanding program scope. Workforce headcounts, program timelines, and capability claims should be cross-checked with NASA program pages, DoD contracts, and independent reporting. BOLE and Sentinel program status are subject to government budget decisions.
Capture scope. The fetched URL is Northrop Grumman's Artemis program page, not a Promontory-facility page. This capture does not substantiate several claims on the page: boosters providing 75% of SLS liftoff thrust, 3.6 million pounds of thrust per booster, BOLE as the most powerful segmented motor with a 2024 test fire, ~80 years of Promontory manufacturing history, Sentinel's $140B+ program value, 5,000+ Promontory workforce, or a near-monopoly in large segmented solid rocket motors. Those claims require separate primary or facility-specific sources.