Intelsat 804

Summary

Intelsat 804
Mission typeCommunications
OperatorIntelsat
COSPAR ID1997-083A
SATCAT no.25110
Mission duration14 years (planned)
Spacecraft properties
Spacecraft typeAS-7000
ManufacturerLockheed Martin
Launch mass3,412 kilograms (7,522 lb)
Start of mission
Launch dateDecember 22, 1997, 00:16 (1997-12-22UTC00:16Z) UTC[1]
RocketAriane-42L H10-3
Launch siteKourou ELA-2
ContractorArianespace
End of mission
DeactivatedJanuary 14, 2005, 22:32 (2005-01-14UTC22:33) UTC
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Now supersynchronous
Longitude44° E
Semi-major axis42,169.0 kilometres (26,202.6 mi)[2]
Perigee altitude35,776.2 kilometres (22,230.3 mi)[2]
Apogee altitude35,820.4 kilometres (22,257.8 mi)[2]
Inclination9.7 degrees[2]
Period1,436.3 minutes[2]
EpochMay 5, 2017[2]
Transponders
Band38 C Band, 6 Ku band
Coverage areaIndian Ocean
Intelsat 8
 

Intelsat 804 was a communications satellite operated by Intelsat. Launched in 1997 it was operated in geostationary orbit at a longitude of 44 degrees east for around 8 years.

Satellite

The fourth of six Intelsat VIII satellites to be launched, Intelsat 804 was built by Lockheed Martin. It was a 3,412-kilogram (7,522 lb) spacecraft. The satellite carried a 2xLEROS-1B apogee motor for propulsion and was equipped with 38 C Band transponders and 6 Ku band transponders, powered by 2 solar cells more batteries.[3] It was designed for a fourteen-year service life.[4]

Launch

The launch of Intelsat 804 made use of an Ariane 4 rocket flying from Guiana Space Centre, Kourou, French Guiana. The launch took place at 00:116 UTC on December 22, 1997, with the spacecraft entering a geosynchronous transfer orbit.[1] The satellite subsequently fired its apogee motor to achieve geostationary orbit.

Failure

On 14 January 2005 at 22:32 UTC, there was a failure of the power system.[5]

See also

References

  1. ^ a b McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved May 5, 2017.
  2. ^ a b c d e f "INTELSAT 804". N2YO. Retrieved May 5, 2017.
  3. ^ Wade, Mark. "Intelsat". Encyclopedia Astronautica. Retrieved May 5, 2017.
  4. ^ Krebs, Gunter. "Intelsat-8 (801, 802, 803, 804) / NSS 803 → NSS 5". Gunter's Space Page. Retrieved May 5, 2017.
  5. ^ TSE-Intelsat 804. Retrieved 2017-5-05.