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Pegasus 1, 2, 3

Pegasus 1 [NASA]

The mission of the Pegasus spacecraft was to measure meteoroid abundances over the mass range 10-7 to 10-4 g in the region near the earth.

In its stored position with panels folded inside the Apollo service module boilerplate, the spacecraft was 5.3-m high, 2.1-m wide, and 28-cm deep. It was divided into two major parts, the central section and the wing assemblies. The satellites' framework was made of riveted aluminum alloy extrusions. The central section was attached to the launch vehicle's second stage. It provided a mounting for the deployment mechanism, electronics cannister, solar power panels, and sensors. The spacecraft was equipped with winglike appendages that extended to form a plane 29.3-m long by 4.3-m wide. These wings carried sensitive penetration surfaces for the meteoroid experiments. Total weight in orbit was 10,500 kg.

The Goddard Space Flight Center's Space Tracking and Data Acquisition Network tracked the satellite using the signal of the telemetry transmitter that transmitted continuously on 136.89 megacycles. Optical tracking coverage was provided by the Smithsonian Astrophysical Observatory's Optical Tracking Network and the Minitrack Optical Tracking System.

This was also a test of the Apollo/Saturn operation and compatibility. The Saturn-1 (Block-2) had a boilerplate Apollo command and service module and a launch escape system tower mounted on top. The boilerplate CSM acted as a shroud to hold the Pegasus satellite. After first stage separation and second stage ignition, the launch escape system was jettisoned. After the second stage attained orbit, the 4500 kg BP was jettisoned into a separate orbit. The Pegasus remained with the second stage in Earth orbit as planned and deployed its winglike panels.

Nation: USA
Type / Application: Micrometeroite Research
Operator: NASA
Contractors: Fairchild Hiller
Equipment: Micrometeroite detectorpanes, solar panels
Configuration: Instruments on Saturn-4 stage, 2 large detector panels
Propulsion: ?
Power: Solar arrays, batteries
Lifetime:
Mass: 10400 kg (#1), 10464 kg (#2); 10500 kg (#3); (1450 kg, payload only)
Orbit: 510 km × 726 km, 31.7 (#1); 502 km × 740 km, 31.7 (#2); 441 km x 449 km, 28.9 (#3)
Satellite COSPAR Date LS Launch Vehicle Remarks
Pegasus 1 1965-009A 16.02.1965 CC LC-37B Saturn-1 (Block-2) with Apollo 103 (BP 16)
Pegasus 2 1965-039A 25.05.1965 CC LC-37B Saturn-1 (Block-2) with Apollo 104 (BP 26)
Pegasus 3 1965-060A 30.07.1965 CC LC-37B Saturn-1 (Block-2) with Apollo 105 (BP 9A)

References: