X Report 23 Oct 2025
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EXPLORER 31 (ISIS-X) (01806)
COSPAR: 1965-098B | Alt Name: Explorer 31
Image
Additional Sources
Launch Details
Launch Date
November 29, 1965
Launch Site
AFWTR
Launch Pad
75-1-1
Launch Vehicle
Thor SLV-2 Agena B
Orbital Elements
NORAD ID
01806
International Designator
1965-098B
Epoch
Sat, 04 Jul 2026 04:04:04 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
79.78°
Right Ascension
335.81°
Eccentricity
Calculating...
Argument of Perigee
101.31°
Period
119.17 min
Mean Motion
12.08 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
EXPLORER 31 (ISIS-X)
Alternative Name
Explorer 31
Type
Payload
Status
Unknown
Owner
GSFC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 01806U 65098B 26185.16949213 .00000294 00000-0 94218-4 0 9993
2 01806 79.7804 335.8079 1422892 101.3102 275.0766 12.08370397650748
Source: Celestrak
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
0.6
Diameter
0.9
Span
1.2
Dry Mass
98
Launch Mass
98
Shape
Oct Cyl
Radar Cross Section
0.5874
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
DME-A
Purpose
Ionosphere Research
Mission
Ionosphere Research
Manufacturer
APL
Life Expectancy
1 year (design);
Bus
DME
Configuration
Unknown
Motor
None
Equipment
Unknown
Power System
Solar cells, 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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