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Intelsat 21

Also called IS-21, S2863


Designation 38749 / 12045A
Launch date 19 Aug 2012
Country of origin International
Mission Telecommunications
Geostationary orbit 58°W
Launch vehicle Zenit Sea Launch #33

Tested at 51.3°W. Replaced Panamsat 9

sat-index articles

Technical data

Lyngsat transponder loading

EIRP coverage (dBW)

Ku-band: Brazil
Ku-band: Mexico
Ku-band: mobility


Prime contractor Boeing
Platform HS702MP
Mass at launch 5984 kg
Dry mass  
Solar array  
Stabilization 3-axis
DC power EOL: 11.8 kW
Design lifetime 18 years

TT&C: downlink: 11451.25/11453.25 MHz or 11451.75/11453.75 MHz
uplink: 13750.5 MHz and 13994.5 MHz


Main transponders 24
Backup transponders  
Power 36 MHz
Coverage Americas
EIRP max  
G/T max  
Polarization linear H/V
Frequencies uplink: 5.925-6.425 GHz
downlink: 3.7-4.2 GHz


Main transponders 36 (36 MHz equivalent)
Backup transponders  
Bandwidth 27, 36 and 54 MHz
Coverage Brazilian beam
mobility beam: South, Central and North West Atlantic
EIRP max  
G/T max  
Polarization linear H/V
Frequencies uplink: 14.0-14.5 GHz
downlink: 11.45-12.20 GHz

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