Intelsat III F-7


Intelsat III F-7
Mission typeCommunications
COSPAR ID1970-032A
SATCAT no.04376
Mission duration5 years (planned)
Spacecraft properties
ManufacturerTRW Inc.
Launch mass647 kilograms (1,426 lb)
BOL mass151 kilograms (333 lb)
Power183 W
Start of mission
Launch dateApril 23, 1970, 00:46:12 (1970-04-23UTC00:46:12Z) UTC[1]
RocketThor Delta M 559/D78
Launch siteCape Canaveral LC-17A
Orbital parameters
Reference systemGeocentric[2]
Longitude124° W (current position)[2]
Semi-major axis42,146 kilometers (26,188 mi)[2]
Perigee altitude35,760.4 kilometers (22,220.5 mi)[2]
Apogee altitude35,789.9 kilometers (22,238.8 mi)[2]
Period1,435.1 minutes[2]
EpochMay 29, 2018[2]
Intelsat III

Intelsat III F-7 was an American communications satellite owned by Intelsat. The satellite had an estimated useful life of 5 years.


The seventh of eight Intelsat III satellites to be launched, Intelsat III F-7 was built by TRW. It was a 647-kilogram (1,426 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.


Intelsat III F-7 was launched by a Delta M rocket, flying from Launch Complex 17A at the Cape Canaveral Air Force Station.

See also


  1. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved May 29, 2018.
  2. ^ a b c d e f g h i Real Time Satellite Tracking, "INTELSAT 3 F-7". Retrieved May 29, 2018.
  3. ^ Wade, Mark. "Intelsat 3". Encyclopedia Astronautica. Retrieved May 29, 2018.