The Pegasus spacecraft were manufactured by Fairchild Hiller, and operated by NASA.

[1] It had a total mass of 10,297 kilograms (22,701 lb),[2] and was equipped with two sets of micrometeoroid detection panels, and a radio for tracking and returning data.

[5] Following launch, Pegasus 1 was given the COSPAR designation 1965-009A, while NORAD assigned it the Satellite Catalog Number 01085.

[1] The spacecraft operated until 29 August 1968, and subsequently remained in orbit until it decayed and reentered the atmosphere on 17 September 1978.

[7] Although minor malfunctions occurred in both the launch vehicle and the satellite, the mission was a success in that all objectives were met.