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FOTON 4 (21737)
COSPAR: 1991-070A | Alt Name: Foton
DECAYED
Image
Additional Sources
Launch Details
Launch Date
October 4, 1991
Launch Site
PLMSC
Launch Pad
LC43/4
Launch Vehicle
Soyuz-U-PVB
Orbital Elements
NORAD ID
21737
International Designator
1991-070A
Decay Date
10/20/1991
Basic Satellite Info
Name
FOTON 4
Alternative Name
Foton
Type
Payload
Status
Decayed
Owner
TSSKB
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
FOTON 4, also known as Foton, is a micro-gravity satellite identified by NORAD CAT ID 21737 and OBJECT ID 1991-070A. It was launched on October 4, 1991, from the Plesetsk Cosmodrome LC43/4 launch pad using a Soyuz-U-PVB launch vehicle. The satellite has dimensions of 6.5 meters in length and diameter, with a span also measuring 6.5 meters. It weighs 2,151 kilograms at launch and is dry mass after deployment. FOTON 4 was manufactured by TSSKB and operates on batteries for power supply. Its mission focused on micro-gravity research purposes. The satellite has a shape characterized as Sphere + DCone with an RCS of 10.76 square meters. The spacecraft's lifetime duration ranges from 13 to 16 days.
Physical Characteristics
Length
6.5
Diameter
2.4
Span
6.5
Dry Mass
2151
Launch Mass
2151
Shape
Sphere + DCone
Radar Cross Section
10.76
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Foton No. 7L
Purpose
Micro-gravity
Mission
Micro-gravity
Manufacturer
TSSKB
Life Expectancy
13-16 days
Bus
Foton
Configuration
Unknown
Motor
11D82M
Equipment
Unknown
Power System
Batteries
ADCS
Unknown
Transmitter Frequency
Unknown
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