Pegasus XL
USA Wikipedia 
Built & Operated By
Orbital Sciences Corporation
Commercial
Family
Pegasus
Maiden Flight
27 JUN 1994
About
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.
Vehicle Specifications
Height
17.6 m
Diameter
1.27 m
Launch Mass
23 T
Thrust
580 kN
Stages
3
Configuration
Expendable
Launch Record
Total Launches
31
Successful
28
Failed
3
Consecutive
25
Upcoming
1
Performance
To LEO
443 kg
Apogee
4,000 km
Launch Cost
$40.0M