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Delta IV Medium+ (5,4)

Delta IV Medium+ (5,4) was the highest-performance single-core Delta IV, combining one Common Booster Core, four GEM 60 solid motors, a five-metre cryogenic upper stage, and a five-metre payload fairing. Eight vehicles flew successfully from 2009 through 2019, all carrying Wideband Global SATCOM spacecraft.

Delta IV Medium+ (5,4)
NASA / Tony Gray · NASA/KSC asset; NASA’s KSC-07PD-2590 catalog identifies the exact Delta II/Dawn launch and credits the photograph to NASA / Tony Gray. NASA’s current Images and Media Usage Guidelines generally permit factual or informational/editorial use with NASA attribution and without implying NASA endorsement. NASA insignia, launch-provider or other third-party marks, identifiable-person rights, and any commercial, promotional, merchandise, or protected-rights use remain separately restricted or clearance-sensitive; verify before such use. · Source
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Identity

Aliases
Delta IV M+(5,4)Delta IV Medium Plus 5,4Delta 4 Medium+ (5,4)
Family Name
Delta IV Medium+
Full Name
Delta IV Medium+ (5,4)
Status
retired
Type
rocket
Variant Name
(5,4)

Details

Description
Delta IV Medium+ (5,4) was the highest-performance single-core Delta IV, combining one Common Booster Core, four GEM 60 solid motors, a five-metre cryogenic upper stage, and a five-metre payload fairing. Eight vehicles flew successfully from 2009 through 2019, all carrying Wideband Global SATCOM spacecraft.
Dimensions
Diameter
…
First Flight Year
2,009
Last Flight Year
2,019
Manufacturer
Operator
Parent Vehicle Family
Propulsion Configurations
  • Entries
    • Count
      1
      Placement
      core
      Propulsion System
      Role
      main
      Variant Notes
      Migrated from legacy reference "RS-68/RS-68A" without inventing a more precise installation.
    • Count
      4
      Placement
      booster
      Propulsion System
      Role
      booster
    • Count
      1
      Placement
      upper
      Propulsion System
      Role
      upper-stage
  • Entries
    • Count
      1
      Placement
      core
      Propulsion System
      Role
      main
      Variant Notes
      ULA identifies the Delta IV Medium+ (5,4) Common Booster Core as powered by RS-68A on WGS-7, WGS-8, WGS-9, and WGS-10 mission references.
    • Count
      4
      Placement
      booster
      Propulsion System
      Role
      booster
    • Count
      1
      Placement
      upper
      Propulsion System
      Role
      upper-stage
    Name
    Delta IV Medium+ (5,4) RS-68A configuration
    Notes
    ULA mission sources identify RS-68A as the Common Booster Core engine for later Delta IV Medium+ (5,4) WGS missions; the existing family-level RS-68/RS-68A baseline is preserved for earlier mixed-era flights.
Rocket Specs
Payload Capacity
GTO
…
LEO
…
Reusability
expendable
Stages Count
2
Strap On Boosters Count
4

Links

Official Url
https://www.ulalaunch.com/docs/default-source/rockets/delta-iv-user%27s-guide.pdf
Wikipedia Url
https://en.wikipedia.org/wiki/Delta_IV

Assets & Meta

Creation Time
July 14, 2026 at 08:52:11 UTC
Updated Time
August 13, 2026 at 21:05:44 UTC
Image
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