COS-B (Celestial Observation Satellite B), ESA’s gamma-ray astronomy satellite covering 25 MeV–1 GeV with a spark-chamber telescope. Delta 2913 from Vandenberg SLC-2W placed the craft in a highly elliptical near-polar orbit; it operated nearly seven years.
- Outcome
- Success
- Orbit
- Elliptical
- Elliptical orbit
- Payload to orbit
- 278 kg
- Flight
- 1st
- of 2 Delta 2913 flights
- Date and time
- 9 August 1975, 01:50 UTC
- Rocket
- Delta 2913
- Builder
- McDonnell Douglas
- Launch site
- Space Launch Complex 2W, Vandenberg SFB, CA, USA
- Payload
- Astrophysics
- International designator
- 1975-072
- Launches in 1975
- 76th of 132
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
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