Geostationary at 23.5 degrees E. Positioned in geosynchronous orbit at 28 deg E in 1998-1999; 5 deg E in 2000.- As of 5 September 2001 located at 5.04 deg E drifting at 0.003 deg E per day. As of 2007 Mar 11 located at 4.97E drifting at 0.000W degrees per day.

Digital Audio Radio Satellite, used for transmission of S-band radio broadcasts direct to receivers in cars in the United States. Sirius 1 was inserted into an initial 6,166 x 47110 km x 63.4 deg transfer orbit by the Proton-K's Blok DM3 upper stage. The satellite's R4D liquid apogee engine made several burns to raise the orbit to 24,388 x 47,097 km x 63.3 deg by July 8. This elliptical, inclined 24 hour orbit had a 24 hour period, designed to keep the satellite between longitude 60W and 140W, with apogee over the northern hemisphere. Stationed at 66 deg W. Positioned in geosynchronous orbit at 66 deg W in 2000. As of 6 September 2001 located at 65.59 deg W drifting at 0.015 deg E per day. As of 2007 Mar 9 located at 65.37W drifting at 0.004E degrees per day.

Sirius Radio's Sirius 2 was launched into a 144 x 168 km x 64.8 deg parking orbit. The Blok DM3 stage then made two burns to deliver Sirius 2 to an elliptical 6192 x 47057 km x 63.4 deg orbit. The was to provide digital radio broadcasts to mobile users in North America. Stationed at 64 deg W. As of 31 August 2001 located at 64.56 deg W drifting at 0.003 deg W per day. As of 2007 Mar 10 located at 67.77W drifting at 0.049E degrees per day.

Direct Radio Broadcasting satellite. Launch delayed from early October due to delays in delivery of engines. Stationed at 66 deg W. The third Sirius digital radio broadcast satellite was a Loral FS-1300 series vehicle and was placed in an initial elliptical 63 degree orbit by the Proton upper stage. Positioned in geosynchronous orbit at 66 deg W in 2000. As of 30 August 2001 located at 64.69 deg W drifting at 0.027 deg E per day. As of 2007 Mar 10 located at 65.64W drifting at 0.010E degrees per day.

Sirius 4 carried Ku-band and Ka-band communications payloads for Nordic, Baltic and East European communications. Three upper-stage burns placed Sirius 4 into a 6916 km x 35478 km x 17.4 deg geostationary transfer orbit. A series of maneuvers by the satellite using its own Leros engine maneuvered the satellite into geosynchronous orbit, stationed at 5 deg East.