| Sirius FM-5 | |
| Mission Type: | Communication |
| Operator: | Sirius XM Radio |
| Cospar Id: | 2009-034A |
| Satcat: | 35493 |
| Mission Duration: | 15 years |
| Spacecraft Bus: | LS-1300 |
| Manufacturer: | Space Systems Loral |
| Launch Date: | UTC |
| Launch Site: | Baikonur 200/39 |
| Orbit Epoch: | January 21, 2014, 08:13:09 UTC[1] |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Geostationary |
| Orbit Periapsis: | 35784km (22,235miles) |
| Orbit Apoapsis: | 35801km (22,246miles) |
| Orbit Inclination: | 0.01 degrees |
| Orbit Period: | 24 hours |
| Orbit Longitude: | 86.2° west |
| Apsis: | gee |
| Trans Band: | 1 E/F/I-band |
| Trans Coverage: | North America |
Sirius FM-5, also known as Radiosat 5, is an American communications satellite which is operated by Sirius XM Radio. It was constructed by Space Systems Loral, based on the LS-1300 bus, and carries a single transponder designed to transmit in the NATO E, F and I bands (IEEE S and X bands). It is currently being used to provide satellite radio broadcasting to North America.
Sirius FM-5 was launched by a Proton-M/Briz-M rocket flying from Site 200/39 at the Baikonur Cosmodrome. The launch was conducted by International Launch Services, and occurred at 19:10 GMT on 30 June 2009. Around nine hours after launch, the satellite separated from the carrier rocket into a geosynchronous transfer orbit. It will raise itself into geostationary orbit by means of its onboard R-4D apogee motor. It also carries four SPT-100 engines for manoeuvring.
It is the first Sirius Radio satellite to be placed in geostationary orbit; the three previous Sirius satellites operate in tundra orbits (and the fourth satellite, Sirius FM-4, was a ground spare that was never launched into space). Originally placed at 96° west, it was moved to 86.2° west alongside XM-5.[2]