Zond 3
From Wikipedia, the free encyclopedia
 |
|
| Organization | Soviet Union |
|---|---|
| Major contractors | OKB-1 |
| Mission type | Planetary Science |
| Satellite of | Sun |
| Launch date | July 18, 1965 at 14:38:00 UTC |
| Launch vehicle | SL-6/A-2-e |
| Mission duration | ? |
| Mission highlight | Fly-by of Moon on July 20, 1965 at distance of 9,200 km |
| COSPAR ID | 1965-056A |
| Home page | NASA NSSDC Master Catalog |
| Mass | 960 kg |
| Orbital elements | |
| Semimajor axis | 1 AU |
| Eccentricity | 0.2683 |
| Inclination | 0.5° |
| Orbital period | 500 d |
| Apoapsis | 1.56 AU |
| Periapsis | 0.9 AU |
| Instruments | |
Zond 3, a member of the Soviet Zond program, was the first Zond spacecraft to successfully complete its mission (a Lunar flyby) and took a number of amazing photographs for its time. It is believed that Zond 3 was initially designed as a companion spacecraft to Zond 2 to be launched to Mars during the 1964 launch window. The opportunity to launch was missed, and the spacecraft was launched on a Mars trajectory, although Mars was no longer attainable, as a spacecraft test.
[edit] Spacecraft design
The spacecraft design was similar to Zond 2, in addition to the imaging equipment it carried a magnetometer, ultraviolet (0.25 to 0.35 micrometre and 0.19 to 0.27 micrometre) and infrared (3 to 4 micrometre) spectrographs, radiation sensors (gas-discharge and scintillation counters), a radiotelescope and a micrometeoroid instrument. It also had an experimental ion engine.
[edit] Mission
The spacecraft, a Mars 3MV-4A, was launched from a Tyazheliy Sputnik (65-056B) earth orbiting platform towards the Moon and interplanetary space. The spacecraft was equipped with an f/106 mm camera and TV system that provided automatic inflight film processing. On July 20 lunar flyby occurred approximately 33 hours after launch at a closest approach of 9200 km. 25 pictures of very good quality were taken of the lunar farside from distances of 11,570 to 9960 km over a period of 68 minutes. The photos covered 19,000,000 km² of the lunar surface. Photo transmissions by facsimile were returned to Earth from a distance of 2,200,000 km and were retransmitted from a distance of 31,500,000 km (some signals still being transmitted from the distance of the orbit of Mars), thus proving the ability of the communications system. After the lunar flyby, Zond 3 continued space exploration in a heliocentric orbit.
This article was originally based on material from NASA (NSSDC) information on Zond 3
[edit] External links
| Preceded by Zond 2 |
Zond program | Succeeded by Zond 1967A |
|
||||||||||
