Pegasus XL | Interstellar Boundary Explorer (IBEX)
The orbital flight Pegasus XL | Interstellar Boundary Explorer (IBEX) departed Air launch to orbit atop a Pegasus XL, bound for the designated orbit.
- Launch time
- Status
- SUCCESS
- Operator
- Orbital Sciences Corporation
- Mission type
- Orbital
- Rocket
- Pegasus XL
- Launch site
- Air launch to orbit
- Launch pad
- Kwajalein Atoll
- Payload
- —
- Target orbit
- Unknown

Mission timeline
- 2008-10-19T17:47:23.000ZPegasus XL roars off the pad at Air launch to orbit.
- The vehicle reaches Max Q, the highest aerodynamic load of the flight.
- MECO — first-stage propulsion ends after a nominal burn.
- Clean stage separation confirmed.
- The upper-stage engine lights up after separation.
- All mission objectives achieved.