Orbital Sciences CorporationPegasusEdwards Air Force Base, Air launch to orbit
Array of Low Energy X-ray Imaging Sensors (ALEXIS)
Launched
April 25, 1993
Image: NASA
Summary
ALEXIS launched on an Orbital Sciences Corporation Pegasus from Edwards Air Force Base, Air launch to orbit on April 25, 1993. It was Orbital Sciences Corporation's 4th launch, 2nd this year and humanity's 3,811th orbital launch attempt. It was the 3rd Pegasus flight and the 2nd this year. The payload was bound for low Earth orbit (LEO). 4 objects from this launch are catalogued, 2 of them payloads.
- Watch
- No webcast on record.
- Vehicle
- Pegasus · Orbital Sciences Corporation
- Booster
- No booster details on record.
- Mission
- Astrophysics · Low Earth Orbit (LEO)
- Milestone
- 3rd Pegasus flight · 2nd this yearOrbital Sciences Corporation's 4th launch2nd this yearhumanity's 3,811th orbital launch attempt26th orbital launch attempt this year
Flight preview
Catalogued objects
4 catalogued: 2 payloads, 2 debris; 4 still in orbit
- Alexis · NORAD 22638 · in orbit
- Orbcomm CDS-2 · NORAD 22639 · in orbit
Data from J. McDowell, planet4589.org
About this launch
ALEXIS (Array of Low Energy X-ray Imaging Sensors) was a Los Alamos National Laboratory satellite funded by the US Department of Energy, carrying six extreme-ultraviolet/soft X-ray telescopes to map the sky and monitor variable sources. Despite a solar panel damaged at launch it operated for twelve years.
Pad

Edwards Air Force Base, Air launch to orbit
3rd launch from Edwards Air Force Base, 1st this year · 4th from Air launch to orbit
5 launches from this pad · 52 from Air launch to orbit
647 days after the previous launch from this pad
Questions
When did ALEXIS launch?
ALEXIS launched on April 25, 1993. The time is known to the hour, not the minute.
Where can I watch ALEXIS?
No webcast is on record for this launch.
What rocket launched ALEXIS?
Pegasus, flown by Orbital Sciences Corporation. Pegasus spec sheet
Where did ALEXIS launch from?
Edwards Air Force Base, Air launch to orbit.
What orbit was ALEXIS going to?
Low Earth Orbit (LEO), a astrophysics mission.
How many satellites did ALEXIS launch?
2 payloads from this launch are catalogued, 2 of them still in orbit (Data from J. McDowell, planet4589.org).
