Key statistics
Satellite CALSPHERE 4(A) at a glance.
Uptime
21878
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: 107.768 minutes
Inclination: 89.9228 deg
SMA: 7501.592 km
Apoapsis: 1175.972 km
Periapsis: 1070.942 km
RAAN: 125.5618 deg
Eccentricy: 0.0070005
Argument of periapsis: 0.8974 deg
Mean anomaly: 60.4323 deg
Mean motion: 13.36203517 rev/day
Mean motion (dot): 0.00000071 rev/day2
B* drag term: 0.00011992 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 6:05 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 1:48 p.m. UTC
TLE line 0: 0 CALSPHERE 4(A)
TLE line 1: 1 01520U 65065H 25187.57515896 .00000071 00000-0 11992-3 0 9992
TLE line 2: 2 01520 89.9228 125.5618 0070005 0.8974 60.4323 13.36203517916551
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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