Rocket file · LV-118
Pegasus XL HAPS
Photograph: NASA/Laurie Losey · NASA Image and Media Guidelines · licence
Pegasus XL HAPS is an expendable launch vehicle built by Orbital Sciences Corporation. It stands 17.6 m tall, lifts 443 kg to low Earth orbit, first flew on 23 December 1997. It has flown 5 times with 5 successes, a success rate of 100.0%. It has nothing on the Launch Library 2 schedule right now.
Specification
Vehicle spec sheet
As listed by Launch Library 2. The cost is Launch Library’s figure, not a quoted price. Figures for rockets outside the sixty most-flown were last read on 2026-11-05.
Flight record
Reliability
About Pegasus XL HAPS
The Pegasus is an air-launched rocket developed by Orbital Sciences Corporation (now part of Northrop Grumman Innovation Systems). Capable of carrying small payloads of up to 443 kilograms (977 lb) into low Earth orbit, the vehicle consists of three solid propellant stages and an optional monopropellant fourth stage. Pegasus is released from its carrier aircraft at approximately 40,000 ft (12,000 m), and its first stage has a wing and a tail to provide lift and attitude control while in the atmosphere. The HAPS variant adds a Hydrazine Auxiliary Propulsion System maneuvering stage.
Upcoming flights
Manifest
There's no Pegasus XL HAPS flight on the Launch Library 2 schedule right now.
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Common questions
- How many times has Pegasus XL HAPS flown?
- 5 times, with 5 successes and 0 failures.
- What is Pegasus XL HAPS's success rate?
- 100.0%. That's 5 successful flights out of 5 attempts.
- When is the next Pegasus XL HAPS launch?
- Pegasus XL HAPS has nothing on the Launch Library 2 schedule right now.
- How much can Pegasus XL HAPS lift to orbit?
- Launch Library 2 lists Pegasus XL HAPS at 443 kg to low Earth orbit.
- Is Pegasus XL HAPS reusable?
- No. Launch Library 2 lists Pegasus XL HAPS as expendable, so no stage is recovered to fly again.