Avant-garde-3 , or Avant-garde SLV-7 ( English Vanguard 3 ) is an American satellite for studying near-Earth space. The last satellite launched by the Avangard program.
| Avangard-3 | |
|---|---|
| Vanguard 3 | |
 Avangard-3 | |
| Manufacturer |  |
| Satellite | Of the earth |
| Launch pad | Cape Canaveral LC-18 |
| Carrier rocket | Avant-garde |
| Launch | September 18, 1959 05:20 UTC |
| NSSDC ID | 1959-007A |
| SCN | 00020 |
| Specifications | |
| Weight | 22.7 kg |
| Orbit elements | |
| Eccentricity | 0.18987199 |
| Mood | 33.3 degrees |
| Period of treatment | 129 minutes |
| Apocenter | 3744 km |
| Pericenter | 512 km |
Construction
The case of the apparatus had a spherical shape with a diameter of 50.8 centimeters and was made of a magnesium alloy. Power was provided by chemical batteries. From scientific instruments, a magnetometer was installed to measure the Earth’s magnetic field, an ionization chamber for recording cosmic radiation, and micrometeorite sensors.
Run
During the launch on September 18, 1959, the spacecraft could not separate from the third stage of the launch vehicle. The satellite transmitted data for 84 days, until December 11, 1959. According to calculations, Avant-garde-3 will exist in orbit for about three hundred years.
Links
- NSSDC Master Catalog. Vanguard 3 . Archived May 16, 2012. (eng.)
- Vanguard (20in Magnetometer, X-Ray, Environment) . Archived May 16, 2012. (eng.)
- Encyclopedia Astronautica. Vanguard 3 . Archived May 16, 2012. (eng.)