NEXT SPACEFLIGHT

Status

Success

Explorer 28 (IMP-C)

Launch Time
Sat May 29, 1965 12:00 UTC

Rocket

Delta C
Image Credit: USAF or NASA
US Air Force
Status: Retired
Liftoff Thrust: 667 kN
Payload to LEO: 410 kg
Payload to GTO: 82 kg
Stages: 3
Strap-ons: 0
Rocket Height: 31.0 m

Mission Details

Explorer 28

Explorer 28 (IMP 3) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.
Performance was essentially normal until late April 1967, then intermittent until May 12, 1967, after which no further data were acquired.

Payloads: 1
Total Mass: 58.0 kg
Highly Elliptical Orbit

Location

SLC-17B, Cape Canaveral SFS, Florida, USA

Stats

1965

48th orbital launch attempt

Delta C

6th mission
3rd mission of 1965
5th successful mission
4th consecutive successful mission