Official name CS1
Alternative name Cesium Satellite 1
Cospar ID 2021-088B
Norad ID 49261
Launch date 2021-09-27
Launch site AFWTR
Launch vehicle Atlas-5(401)
Country/Organization USA
Type application Technology
Operator CesiumAstro
RCS size MEDIUM
Decay date ON ORBIT
Period (min) 94.54
Inclination (deg) 97.43
Perigee (km) 485
Apogee (km) 507
Eccentricity 0.0221774193548387
Mean motion (revs. per day) 15.2316479796911
Semi-Major axis (km) 6874.135
Raan (deg) 206.0868
Arg of perigee (deg) 19.2677
Shape Box + 3 Pan
Mass (kg) 10
Height (m) 0.3
Width (m) 0.2
Depth (m) 0.2
Span (m^2) 1
Contractors CesiumAstro
Configuration CubeSat (6U)
Power Solar cells, batteries

Cesium Mission 1 (CM1), consisting of Cesium Satellite 1 and 2, is CesiumAstro's first mission to launch and operate their own hardware in space. CM1 provides an on-orbit platform that consists of two satellites for customer experiments that push the boundaries of small satellite communication. In addition, it gives Cesium the capability to demonstrate advanced features of our technology such as dynamic waveform switching and dynamic link optimization. With the launch of Mission 1, Cesium will have a complete commercial phased array communication system as well as an inter-satellite link in LEO.

Cesium Satellite 1 and 2 are 6U CubeSats with Cesium Nightingale 1 active phased array and inter-satellite link payloads. The spacecrafts have a high-accuracy attitude system with a star tracker and a state-of-the-art electric propulsion system.

The satellites were to perform several orbital maneuvres using thei electric propulsion system. At the end of the mission, they were also to actively deorbit with their propulsion system.

Both satellites were successfuly launched as secondary payloads on an Atlas-5(401), but both experienced power failures.

Satellite COSPAR Date LS Launch Vehicle Remarks
CS2 2021-088C 2021-09-27 AFWTR Atlas-5(401) with Landsat 9, CuPID, CUTE, Cesium Satellite 1
CS1 2021-088B 2021-09-27 AFWTR Atlas-5(401) with Landsat 9, CuPID, CUTE, Cesium Satellite 2