| Mission type | Communications |
|---|---|
| Operator | Intelsat/SKY Perfect JSAT Group |
| COSPAR ID | 2007-063B |
| SATCATno. | 32388 |
| Mission duration | 15 years |
| Spacecraft properties | |
| Bus | STAR-2 |
| Manufacturer | Orbital Sciences |
| Launch mass | 2,350 kilograms (5,180 lb) |
| Start of mission | |
| Launch date | 21 December 2007, 21:41:55 (2007-12-21UTC21:41:55Z) UTC |
| Rocket | Ariane 5GS |
| Launch site | KourouELA-3 |
| Contractor | Arianespace |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 74° west (2008-2011) 84.9° east (2011—) |
| Transponders | |
| Band | 20 Ku-band |
| Coverage area | Continental United States Caribbean Canada |
| EIRP | 3.5 kilowatts(minimum EOL) |
Horizons-2 is aKu bandcommunications satellite owned byHorizons Satellite, a joint venture betweenSKY Perfect JSAT Group andIntelsat.[1] Its orbital slot is located at74° west longitude.
Horizons-2 was launched from theGuiana Space Centre—along with theRascom-QAF 1 spacecraft—aboard an ArianespaceAriane 5-GS. Launch occurred at 21:42GMT on 21 December 2007.[2]
Horizons-2 was built byOrbital Sciences Corporation based on itsSTAR-2 satellite platform, which will generate 3.5 kilowatts of payload power by means of two solar arrays, each equipped with three panels of UJT gallium arsenide cells. The solar arrays charge twolithium ion batteries with capacities of at least 3,850watt-hours.
The spacecraft is 3-axis stabilized, with a zero momentum system.Hydrazine-fuelled monopropellant thrusters are used for stationkeeping, with anIHIBT-4 bipropellant engine used for insertion into geostationary orbit. It has a design life of 15 years; however, it is fuelled for at least 16 years of operations. Its payload consists of 20 Ku-band transponders broadcasting through two 2.3-meter (7.5 ft) dual gridded shaped reflectors.
[3] It has 16 active transponders with 22-for-16 redundant 85 W TWTAs and four active transponders with 6-for-4 redundant 150 W TWTAs. The satellite will provide service to the continental United States, the Caribbean and parts of Canada.
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