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Titan IV 401B/Centaur

Titan IV 401B/Centaur paired the Lockheed Martin Titan IVB core and upgraded solid rocket motors with a cryogenic Centaur upper stage. Seven articles flew between 1997 and 2003, including Cassini-Huygens.

Titan IV 401B/Centaur
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Identity

Aliases
Titan IVB-CentaurTitan 401B-CentaurTitan IVB/Centaur
Family Name
Titan IV
Full Name
Titan IV 401B/Centaur
Status
retired
Type
rocket
Variant Name
401B/Centaur

Details

Description
Titan IV 401B/Centaur paired the Lockheed Martin Titan IVB core and upgraded solid rocket motors with a cryogenic Centaur upper stage. Seven articles flew between 1997 and 2003, including Cassini-Huygens.
Dimensions
Height
…
First Flight Year
1,997
Last Flight Year
2,003
Manufacturer
Operator
Parent Vehicle Family
Propulsion Configurations
  • Entries
    • Count
      2
      Placement
      booster
      Propulsion System
      Role
      booster
      Stage
      stage 0
      Variant Notes
      Titan IV Solid Rocket Motor Upgrade (SRMU), three-segment stage-zero pair.
    • Count
      2
      Placement
      core
      Propulsion System
      Role
      main
      Stage
      first stage
      Variant Notes
      Aerojet LR87-AJ-11 twin first-stage engine assembly; NASA's Titan IV table uses this exact designation.
    • Count
      1
      Placement
      core
      Propulsion System
      Role
      main
      Stage
      second stage
      Variant Notes
      Aerojet LR91-AJ-11 second-stage engine.
    • Count
      2
      Placement
      upper
      Propulsion System
      Role
      upper-stage
      Stage
      third stage
      Variant Notes
      Centaur twin Pratt & Whitney RL10A-3-3A engines; NASA documents the Titan/Centaur Centaur stage and twin RL10 installation.
    Name
    Titan IV 401B/Centaur exact configuration
    Notes
    NASA/USAF sources define the Titan IV/Centaur stack as two stage-zero solid motors, a twin-engine LR87 first-stage core, a single LR91 second-stage core, and a Centaur upper stage with twin RL10A-3-3A engines. This configuration is limited to the 401B/Centaur branch; Titan IVA/IVB IUS and no-upper-stage siblings remain separate.
Rocket Specs
Liftoff Mass
…
Reusability
expendable
Stages Count
3
Strap On Boosters Count
2

Links

Official Url
https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/692874/lockheed-martin-titan-ivb-rocket/

Assets & Meta

Creation Time
July 13, 2026 at 09:14:57 UTC
Updated Time
August 23, 2026 at 20:37:29 UTC
Image
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Titan IV 401B/Centaur - AeroVia