Space Brief 5 Dec 2025
Focusing on military satellite initiatives, defense strategies, and advancements in air and cyber capabilities
IGS 4B (30587)
COSPAR: 2007-005B | Alt Name: JSE kougaku-3 g jissho eisei
DECAYED
Image
Additional Sources
Launch Details
Launch Date
February 24, 2007
Launch Site
TANSC
Launch Pad
Y
Launch Vehicle
H-IIA 2024
Orbital Elements
NORAD ID
30587
International Designator
2007-005B
Decay Date
11/12/2013
Basic Satellite Info
Name
IGS 4B
Alternative Name
JSE kougaku-3 g jissho eisei
Type
Payload
Status
Decayed
Owner
CSICE
Country
Japan
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
IGS 4B, also known as JSE kougaku-3 g jissho eisei, is a reconnaissance satellite launched on February 24, 2007, from the Tanegashima Space Center in Japan using an H-IIA 2024 launch vehicle. The spacecraft has dimensions of 3 meters in length and 4 meters in diameter with a span of 22.5 meters, indicating the presence of deployable structures like solar panels or antennas. It was manufactured by MELCO and owned by CSICE. IGS 4B carries an optical payload designated as IGS Optical-3 Test Sat for conducting optical reconnaissance missions. The satellite has a launch mass of 1500 kg and a dry mass of 1000 kg, suggesting significant fuel reserves or operational capabilities. Its shape is described as box-like with two additional panels.
Physical Characteristics
Length
3
Diameter
4
Span
22.5
Dry Mass
1000
Launch Mass
1500
Shape
Box + 2 Pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
IGS Optical-3 Test Sat
Purpose
Reconnaissance, optical
Mission
Reconnaissance, optical
Manufacturer
MELCO
Life Expectancy
Unknown
Bus
IGS-O
Configuration
?
Motor
?
Equipment
?
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
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