Key statistics
Satellite USA 143 at a glance.
Uptime
9567
Days in orbit
Revolutions
≈ 9.4
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
28.2
Latest
Satellite identification and parameters
Extended collection of information and parameters for USA 143.
Object identification
Identified? True
Debris? False
Object name: USA 143
International designator: 1999-023A
Object number (NORAD): 25724
Object ID (CCSDS): 25724
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 153.601 minutes
Inclination: 28.2337 deg
SMA: 9500.726 km
Apoapsis: 5147.157 km
Periapsis: 1098.026 km
RAAN: 86.9483 deg
Eccentricy: 0.2130959
Argument of periapsis: 311.5701 deg
Mean anomaly: 32.0369 deg
Mean motion: 9.37491943 rev/day
Mean motion (dot): -0.00000071 rev/day2
B* drag term: -0.0013782 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 10:46 p.m. UTC
TLE line 0: 0 USA 143
TLE line 1: 1 25724U 99023A 25188.94926338 -.00000071 00000-0 -13782-2 0 9994
TLE line 2: 2 25724 28.2337 86.9483 2130959 311.5701 32.0369 9.37491943 40042
Live tracking on map
Real-time ground track for satellite USA 143.
In-orbit conjunctions
There are no conjunctions computed for USA 143, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Milstar (Military Strategic & Tactical Relay) is the tactical and strategic multiservice satellite system designed to provide survivable communications for U.S. forces worldwide.
USA 143 was lifted into orbit during the mission ‘Titan IVB | Milstar 3’, on board a Titan IVB space rocket.
The launch took place on April 30, 1999, 4:30 p.m. from Space Launch Complex 40.
For more information about the launch, click the button.
Titan IVB | Milstar 3
Agency: N/A
Status: Launch Failure
Launch date: April 30, 1999, 4:30 p.m. UTC
Rocket: Titan IVB
Launch pad: Space Launch Complex 40
Location: Cape Canaveral SFS, FL, USA
...
Latest news about this satellite
There are no fresh news available about this satellite. Check back as we update our databases every day.
Newsletter sign-up
Weekly statistics, charts and insights to help you stay on top of the space industry.
