Engineering:Intelsat III F-8
Mission type | Communications |
---|---|
Operator | Intelsat |
COSPAR ID | 1970-055A |
SATCAT no. | 04478 |
Mission duration | 5 years (planned) Launch failure |
Spacecraft properties | |
Manufacturer | TRW |
Launch mass | 293 kilograms (646 lb) |
BOL mass | 151 kilograms (333 lb) |
Power | 183 W |
Start of mission | |
Launch date | July 23, 1970, 00:16:03[1] | UTC
Rocket | Delta M |
Launch site | Cape Canaveral Air Force Station LC-17A |
Orbital parameters | |
Reference system | Geocentric[2] |
Regime | Geostationary[2] |
Eccentricity | 0.24386[2] |
Perigee altitude | 19,400 kilometers (12,100 mi)[2] |
Apogee altitude | 36,030 kilometers (22,390 mi)[2] |
Inclination | 13.3°[2] |
Period | 1,043.0 minutes[2] |
Epoch | July 23, 1970[2] |
Intelsat III |
Intelsat III F-8 was a communications satellite owned by Intelsat. The satellite had an estimated useful life of 5 years.
Design
The last of eight Intelsat III satellites to be launched, Intelsat III F-8 was built by TRW. It was a 293-kilogram (646 lb) spacecraft equipped with two transponders to be powered by body-mounted solar cells generating 183 watts of power.[3] It had a design life of five years and carried an SVM-2 apogee motor for propulsion.[4]
Launch
Intelsat III F-8 was launched on a Delta M rocket, flying from Launch Complex 17A at the Cape Canaveral Air Force Station . The launch took place on July 23, 1970, with the spacecraft bound for a geosynchronous transfer orbit.[1]
The Intelsat III F-8 was lost due to a malfunction during the apogee motor firing. Communications stopped 14.5 seconds into the planned 27 second apogee motor burn.
See also
- 1970 in spaceflight
References
- ↑ Jump up to: 1.0 1.1 McDowell, Jonathan. "Launch Log". Jonathan's Space Page. http://planet4589.org/space/log/launchlog.txt.
- ↑ Jump up to: 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 NASA, Goddard Space Flight Center. "INTELSAT 3 F-8". NSSDC Master Catalog. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-055A.
- ↑ Wade, Mark. "Intelsat 3". Encyclopedia Astronautica. http://www.astronautix.com/craft/intlsat3.htm. Retrieved April 21, 2017.
- ↑ Krebs, Gunter. "Intelsat-3". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/intelsat-3.htm.
Original source: https://en.wikipedia.org/wiki/Intelsat III F-8.
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