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INTELSAT 21 (IS-21) (38749)
COSPAR: 2012-045A | Alt Name: Intelsat IS-21
Image
Additional Sources
Launch Details
Launch Date
August 19, 2012
Launch Site
SEAL
Launch Pad
KLA -
Launch Vehicle
Zenit-3SL
Orbital Elements
NORAD ID
38749
International Designator
2012-045A
Epoch
Sat, 04 Jul 2026 05:03:27 GMT
Apogee
Calculating...
Perigee
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Inclination
0.02°
Right Ascension
287.42°
Eccentricity
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Argument of Perigee
190.50°
Period
1436.09 min
Mean Motion
1.00 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
INTELSAT 21 (IS-21)
Alternative Name
Intelsat IS-21
Type
Payload
Status
Operational
Owner
INTELU
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 38749U 12045A 26185.21073061 -.00000273 00000-0 00000-0 0 9998
2 38749 0.0232 287.4228 0001871 190.4986 182.1747 1.00271942 50693
Source: Celestrak
Summary
INTELSAT 21 (IS-21) is a communication satellite with a NORAD catalog ID of 38749 and an object ID of 2012-045A. It was launched on August 19, 2012, from the Sea Launch platform using a Zenit-3SL launch vehicle. The satellite has dimensions of 6.9 meters in length, 3.2 meters in diameter, and spans 36.9 meters with its solar arrays deployed. It weighs 5984 kilograms at launch and 3000 kilograms dry. Equipped with a box shape and two deployable solar panels, INTELSAT 21 has a power system that includes batteries alongside the solar arrays. Its equipment consists of 24 C-band transponders and 36 Ku-band transponders for communication purposes. The satellite was manufactured by Boeing Satellite Systems (BOES) and is owned by Intelsat. It operates with a Leros motor and has an expected lifetime of over 15 years.
Physical Characteristics
Length
6.9
Diameter
3.2
Span
36.9
Dry Mass
3000
Launch Mass
5984
Shape
Box + 2 Pan
Radar Cross Section
52.4
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Intelsat IS-21
Purpose
Communication
Mission
Communication
Manufacturer
BOES
Life Expectancy
15+ years
Bus
BSS-702MP
Configuration
BSS-702MP
Motor
Leros
Equipment
24 C-band transponders, 36 Ku-band transponders
Power System
2 deployable solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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