Key statistics
Satellite NAVSTAR 39 (USA 128) at a glance.
Uptime
10664
Days in orbit
Revolutions
≈ 1.9
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
53.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for NAVSTAR 39 (USA 128).
Object identification
Identified? True
Debris? False
Object name: NAVSTAR 39 (USA 128)
International designator: 1996-056A
Object number (NORAD): 24320
Object ID (CCSDS): 24320
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 772.122 minutes
Inclination: 53.8149 deg
SMA: 27879.454 km
Apoapsis: 21580.321 km
Periapsis: 21422.317 km
RAAN: 244.0187 deg
Eccentricy: 0.0028337
Argument of periapsis: 212.148 deg
Mean anomaly: 323.2684 deg
Mean motion: 1.86498943 rev/day
Mean motion (dot): 0.00000006 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Nov. 22, 2025, 6:56 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Nov. 22, 2025, 10:14 a.m. UTC
TLE line 0: 0 NAVSTAR 39 (USA 128)
TLE line 1: 1 24320U 96056A 25326.42676946 .00000006 00000-0 00000-0 0 9995
TLE line 2: 2 24320 53.8149 244.0187 0028337 212.1480 323.2684 1.86498943206659
Live tracking on map
Real-time ground track for satellite NAVSTAR 39 (USA 128).
In-orbit conjunctions
There are no conjunctions computed for NAVSTAR 39 (USA 128), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
GPS-2A (Global Positioning System) or Navstar-2A (Navigation System using Timing And ranging) are improved satellites of the second generation of the GPS navigation system.
NAVSTAR 39 (USA 128) was lifted into orbit during the mission ‘Delta II | GPS IIA-18’, on board a Delta II space rocket.
The launch took place on Sept. 12, 1996, 8:49 a.m. from Space Launch Complex 17A.
For more information about the launch, click the button.
Delta II | GPS IIA-18
Agency: N/A
Status: Launch Successful
Launch date: Sept. 12, 1996, 8:49 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 17A
Location: Cape Canaveral SFS, FL, USA
...
Latest news about this satellite
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