Launch Date
August 13, 1965
Launch Site
AFWTR
Launch Pad
75-1-1
Launch Vehicle
Thor Ablestar
NORAD ID
01520
International Designator
1965-065H
Epoch
Sun, 19 Jul 2026 17:26:07 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
89.90°
Right Ascension
122.17°
Eccentricity
Calculating...
Argument of Perigee
13.43°
Period
107.76 min
Mean Motion
13.36 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Name
CALSPHERE 4A
Alternative Name
Calsphere
Type
Status
Owner
Naval Research Laboratory
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
1 01520U 65065H 26200.72647257 .00000073 00000+0 12169-3 0 9991
2 01520 89.8986 122.1680 0070835 13.4322 70.1464 13.36283746967058
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
0.4
Diameter
0.4
Span
0.4
Dry Mass
4
Launch Mass
4
Shape
Sphere
Radar Cross Section
0.052
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Payload
NRL PL158
Purpose
Radar calibration
Mission
Radar calibration
Manufacturer
Naval Research Laboratory
Life Expectancy
Passive
Bus
NRL 14
Configuration
Sphere
Motor
None
Equipment
None
Power System
None
ADCS
Unknown
Transmitter Frequency
Unknown
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