6 December 1998, 00:57 UTC
Submillimeter Wave Astronomy Satellite (SWAS)

Launched NASA's Submillimeter Wave Astronomy Satellite (SWAS) via air-launched Pegasus XL to study interstellar clouds by measuring water, molecular oxygen and carbon emissions, helping researchers understand star formation.
- Outcome
- Success
- Payload to orbit
- 282 kg
- Flight
- 13th
- of 31 Pegasus XL flights
- Date and time
- 6 December 1998, 00:57 UTC
- Rocket
- Pegasus XL
- Builder
- OSC
- Launch site
- Vandenberg Space Force Base, Air launch to orbit
- Payload
- Unknown
- International designator
- 1998-071
- Launches in 1998
- 76th of 82
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
View satellites in Space Atlas