&sq=&lang=&file=File:Juno_II_AM-16_(3).jpg) The Juno II launch vehicle carrying Explorer S-1 destroyed by the Range Safety Officer 5.5 seconds after liftoff. | |
| Names | Explorer S-1 Explorer 7X NASA S-1 |
|---|---|
| Mission type | Earth science |
| Operator | NASA |
| COSPAR ID | EXP-7X |
| Mission duration | Failed to orbit |
| Spacecraft properties | |
| Spacecraft | Explorer S-1 |
| Spacecraft type | Science Explorer |
| Bus | S-1 |
| Manufacturer | Jet Propulsion Laboratory |
| Launch mass | 41.5 kg (91 lb) |
| Dimensions | 76 × 76 cm (30 × 30 in) |
| Start of mission | |
| Launch date | 16 July 1959, 17:37:03 GMT |
| Rocket | Juno II (AM-16) |
| Launch site | Cape Canaveral, LC-5 |
| Contractor | Army Ballistic Missile Agency |
| End of mission | |
| Destroyed | Failed to orbit |
| Orbital parameters | |
| Reference system | Geocentric orbit (planned) |
| Regime | Low Earth orbit |
| Perigee altitude | 416 km (258 mi) |
| Apogee altitude | 2,286 km (1,420 mi) |
| Inclination | 49.9° |
| Period | 112.7 minutes |
| Instruments | |
| Ground Based Ionospheric Heavy Primary Cosmic Rays Micrometeorite Solar X-Ray and Lyman-Alpha Radiation Thermal Radiation Trapped Radiation and Solar Protons | |
Explorer S-1, also known as NASA S-1 or Explorer 7X,[1] was a NASA Earth science satellite equipped with a suite of scientific instruments to study the environment around the Earth. The spacecraft and its Juno II launch vehicle were destroyed five seconds after launch on 16 July 1959, in a spectacular launch failure caused by complications with the launch vehicle's power supply. A relaunch of the mission in October 1959, Explorer 7 (S-1A), was successful.
- ^ "Launch Log". Jonathan's Space Report. 21 July 2021. Retrieved 2 November 2021.