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A second Starlink satellite malfunction in just over three months has generated on-orbit debris, raising fresh questions about SpaceX's 10,151-strong working constellation.
IRIDIUM 21 (25778)
COSPAR: 1999-032B | Alt Name: Iridium 21A
DECAYED
Image
Additional Sources
Launch Details
Launch Date
June 11, 1999
Launch Site
TAISC
Launch Pad
LC7
Launch Vehicle
Chang Zheng 2C-III/SD
Orbital Elements
NORAD ID
25778
International Designator
1999-032B
Decay Date
5/24/2018
Basic Satellite Info
Name
IRIDIUM 21
Alternative Name
Iridium 21A
Type
Payload
Status
Decayed
Owner
IRID
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
IRIDIUM 21, also known as Iridium 21A, is a communication satellite manufactured by MOTO and operated by IRID. It was launched on June 11, 1999, from the TISC launch site using the Chang Zheng 2C-III/SD vehicle from LC7. The satellite has a length of 3.5 meters, diameter of 1 meter, span of 5 meters, and a dry mass of 556 kg. It was equipped with two deployable solar arrays and batteries for power supply. IRIDIUM 21 is configured as LM-700A on the LM700 bus, has a mission lifetime of 8 years, and its motor type is Primex EHT. The satellite's shape is described as Box + 2 Pan with an RCS of 3.317.
Physical Characteristics
Length
3.5
Diameter
1
Span
5
Dry Mass
556
Launch Mass
655
Shape
Box + 2 Pan
Radar Cross Section
3.317
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Iridium SV093
Purpose
Communication
Mission
Communication
Manufacturer
MOTO
Life Expectancy
8 years
Bus
LM700
Configuration
LM-700A
Motor
Primex EHT
Equipment
?
Power System
2 deployable solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
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