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Mars Observer four 0.9 N hydrazine roll-control engines
Mars Observer used four 0.9 N catalytic hydrazine engines for roll control during the mission.
Identity
Aliases
Mars Observer 0.9 N hydrazine engines
Mars Observer roll-control thrusters
Mars Observer small hydrazine control engines
Domains
spaceflight
Identity Level
integrated-system
Kind
chemical-thruster
Name
Mars Observer four 0.9 N hydrazine roll-control engines
Status
historical
Details
Description
Mars Observer used four 0.9 N catalytic hydrazine engines for roll control during the mission.
Propellants
hydrazine
Links
Official Url
https://ntrs.nasa.gov/api/citations/19910018889/downloads/19910018889.pdf?attachment=true
Assets & Meta
Creation Time
September 8, 2026 at 09:44:17 UTC
Updated Time
September 8, 2026 at 09:44:17 UTC
Other
Sources
Accessed Date
2026-09-08
Note
NASA spacecraft-propulsion overview identifies four 0.9 N Mars Observer monopropellant hydrazine engines for roll control.
Publisher
NASA Technical Reports Server
Title
Satellite/spacecraft propulsion
Url
https://ntrs.nasa.gov/api/citations/19910018889/downloads/19910018889.pdf?attachment=true
Accessed Date
2026-09-08
Note
JPL identifies Mars Observer as a past Mars orbiter; this source supplies mission context for the installed hydrazine roll-control set.
Publisher
NASA Jet Propulsion Laboratory
Title
Mars Observer
Url
https://www.jpl.nasa.gov/missions/mars-observer/
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