Technical info of the Vanguard 1 satellite

Launch date 07:15:41 am EST 17 March 1958
MissionPrim:test-- SEC:High atmosphere study
Perigee/ApogeeClick here
InclinationClick here
PeriodClick here
Launch vehicleTest Vehicle 4
Launch siteCape Canaveral
Diameter6.4 inch
Mass at launch1.47 kilogram (3.25 pound)
Visibility12 - 15.th mag.
Time in orbit250 - 600 years The lifetime of a satellite is highly dependent on the future solar activity which effects the atmospheric drag a satellite experiences.
InstrumentsTemperature sounder
Radio Two transmitters 100 and 50 mW
Source of energyMercury battery and 6 solar panels
Transmitting freq.108.00 and 108.03 MHZ
Transmitter lifetime6 years 3 month