Key statistics
Satellite CALSPHERE 4(A) at a glance.
Uptime
21934
Days in orbit
Revolutions
≈ 13.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
89.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for CALSPHERE 4(A).
Object identification
Identified? True
Debris? False
Object name: CALSPHERE 4(A)
International designator: 1965-065H
Object number (NORAD): 1520
Object ID (CCSDS): 1520
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: SMALL
Orbital parameters
Period: 107.767 minutes
Inclination: 89.9175 deg
SMA: 7501.558 km
Apoapsis: 1174.788 km
Periapsis: 1072.059 km
RAAN: 125.1306 deg
Eccentricy: 0.00684713
Argument of periapsis: 198.7805 deg
Mean anomaly: 295.3566 deg
Mean motion: 13.36212473 rev/day
Mean motion (dot): 0.00000122 rev/day2
B* drag term: 0.00021645106 1/REarth
Two-line elements (TLE)
Creation date: Sept. 1, 2025, 2:20 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Aug. 31, 2025, 9:38 p.m. UTC
TLE line 0: 0 CALSPHERE 4(A)
TLE line 1: 1 01520U 65065H 25243.90201498 .00000122 00000-0 21645-3 0 9995
TLE line 2: 2 01520 89.9175 125.1306 0068471 198.7805 295.3566 13.36212473924071
Live tracking on map
Real-time ground track for satellite CALSPHERE 4(A).
Associated space launch
The Transit-O series of satellites that closely followed the design of Transit 5C-1 were also called “Oscars” (Oscar is the phonetic alphabet for “O”, i. e., operational). They were also called NNS (Navy Navigation Satellite) or shortened NavSat.
CALSPHERE 4(A) was lifted into orbit during the mission ‘Thor DM-21 Ablestar | Transit-O 5’, on board a Thor DM-21 Ablestar space rocket.
The launch took place on Aug. 13, 1965, 10:11 p.m. from Space Launch Complex 2E.
For more information about the launch, click the button.
Thor DM-21 Ablestar | Transit-O 5
Agency: N/A
Status: Launch Successful
Launch date: Aug. 13, 1965, 10:11 p.m. UTC
Rocket: Thor DM-21 Ablestar
Launch pad: Space Launch Complex 2E
Location: Vandenberg SFB, CA, USA
...
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