| Mission type | Communications |
|---|---|
| Operator | Intelsat |
| COSPAR ID | 1975-042A[1] |
| SATCAT no. | 07815[2] |
| Mission duration | 7 years |
| Spacecraft properties | |
| Bus | HS-312 |
| Manufacturer | Hughes Aircraft |
| Launch mass | 1,414 kilograms (3,117 lb) |
| BOL mass | 730 kilograms (1,610 lb) |
| Start of mission | |
| Launch date | 22 May 1975, 22:04 UTC |
| Rocket | Atlas SLV-3D Centaur-D1A |
| Launch site | Cape Canaveral LC-36B |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Semi-major axis | 42,449.0 kilometers (26,376.6 mi) |
| Perigee altitude | 36,032.3 kilometers (22,389.4 mi) |
| Apogee altitude | 36,124.6 kilometers (22,446.8 mi) |
| Inclination | 14.3° |
| Period | 1,450.7 minutes |
| Epoch | 21 April 2017 |
| Transponders | |
| Band | 12 IEEE C band (NATO G/H-band) |
| Bandwidth | 36 MHz |
Intelsat IV | |
Intelsat IV F-1 was a geostationary communication satellite built by Hughes, it was owned by Intelsat. The satellite was based on the HS-312 platform and its estimated useful life was 7 years.