X Report 21 Nov 2025
SpaceX celebrates significant milestones with its 100th launch of the year, enhancing Starlink's coverage while preparing for an escalating Starship production cadence.
EXPLORER 41 (IMP-5) (03990)
COSPAR: 1969-053A | Alt Name: IMP 5
DECAYED
Image
Additional Sources
Launch Details
Launch Date
June 21, 1969
Launch Site
AFWTR
Launch Pad
SLC2W
Launch Vehicle
Thor Delta E1
Orbital Elements
NORAD ID
03990
International Designator
1969-053A
Decay Date
12/23/1972
Explore in the Catalog
Basic Satellite Info
Name
EXPLORER 41 (IMP-5)
Alternative Name
IMP 5
Type
Payload
Status
Decayed
Owner
GSFC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
Apologies, there is no summary for this satellite yet. I am working to generate these for every object in the catalog, but it is going to take time.
Physical Characteristics
Length
0.3
Diameter
0.7
Span
4
Dry Mass
79
Launch Mass
79
Shape
Oct Cyl + 4 Pan + 2 Ant
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
IMP G
Purpose
Unknown
Mission
Unknown
Manufacturer
GSFC
Life Expectancy
Unknown
Bus
IMP
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
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