Intelsat III F-7

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

Intelsat III F-7

Mission type	Communications
Operator	Intelsat
COSPAR ID	1970-032A
SATCAT no.	04376
Mission duration	5 years (planned)
Spacecraft properties
Manufacturer	TRW Inc.
Launch mass	647 kilograms (1,426 lb)
BOL mass	151 kilograms (333 lb)
Power	183 W
Start of mission
Launch date	April 23, 1970, 00:46:12 (1970-04-23UTC00:46:12Z) UTC[1]
Rocket	Thor Delta M 559/D78
Launch site	Cape Canaveral LC-17A
Orbital parameters
Reference system	Geocentric[2]
Regime	Geostationary[2]
Longitude	124° W (current position)[2]
Semi-major axis	42,146 kilometers (26,188 mi)[2]
Perigee altitude	35,760.4 kilometers (22,220.5 mi)[2]
Apogee altitude	35,789.9 kilometers (22,238.8 mi)[2]
Inclination	4.9°[2]
Period	1,435.1 minutes[2]
Epoch	May 29, 2018[2]
Intelsat III ← Intelsat III F-6 Intelsat III F-8 →

Design

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.

Launch

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

• Spaceflight portal

• 1970 in spaceflight