Launch Date
November 29, 1965
Launch Site
AFWTR
Launch Pad
75-1-1
Launch Vehicle
Thor SLV-2 Agena B
NORAD ID
01806
International Designator
1965-098B
Epoch
Sun, 19 Jul 2026 19:36:36 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
79.78°
Right Ascension
322.91°
Eccentricity
Calculating...
Argument of Perigee
70.65°
Period
119.17 min
Mean Motion
12.08 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Name
EXPLORER 31 (ISIS-X)
Alternative Name
Explorer 31
Type
Status
Owner
GSFC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
1 01806U 65098B 26200.81709068 .00000184 00000+0 56453-4 0 9991
2 01806 79.7799 322.9056 1422482 70.6490 304.2579 12.08372155652637
Source: Celestrak
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.
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
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
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