AeroVia Logo
AeroVia
Home
Resources
Courses
Community
About
Back to Vehicle Families

Pegasus XL with HAPS

Pegasus XL with HAPS added the liquid monopropellant Hydrazine Auxiliary Propulsion System as a fourth stage, improving injection accuracy and performance for high-altitude missions. Six vehicles flew successfully from 1997 through 2005.

Pegasus XL with HAPS
NASA Kennedy Space Center · NASA/KSC asset; NASA’s KSC-07PD-0975 catalog identifies Kennedy Space Center (KSC), credits the photograph to NASA, and describes the exact mated Pegasus XL/AIM vehicle. NASA’s current Images and Media Usage Guidelines generally permit factual or informational/editorial use with NASA attribution and without implying NASA endorsement. This image visibly includes NASA insignia and Orbital, ATK, AIM, CLASP, and U.S. marks; those logos, trademarks, and any third-party rights are separately restricted or clearance-sensitive. This credit does not grant trademark or third-party rights; verify any commercial, promotional, merchandise, or other protected-rights use. · Source
Follow this vehicle family

Future launches and major activity directly linked to this vehicle family.

Identity

Family Name
Pegasus
Full Name
Pegasus XL with HAPS
Status
retired
Type
rocket
Variant Name
XL with HAPS

Details

Description
Pegasus XL with HAPS added the liquid monopropellant Hydrazine Auxiliary Propulsion System as a fourth stage, improving injection accuracy and performance for high-altitude missions. Six vehicles flew successfully from 1997 through 2005.
First Flight Year
1,997
Last Flight Year
2,005
Manufacturer
Operator
Parent Vehicle Family
Rocket Specs
Reusability
expendable
Stages Count
4

Links

Official Url
https://www.northropgrumman.com/wp-content/uploads/Pegasus-User-Guide-1.pdf

Assets & Meta

Creation Time
July 17, 2026 at 03:02:43 UTC
Updated Time
July 19, 2026 at 09:46:58 UTC
Image
Download

Other

Search Name
Pegasus XL with HAPS