Satellites/NAVSTAR 77 (USA 289)

NAVSTAR 77 (USA 289)

Satellite · United StatesActive

NORAD Number

43873

COSPAR ID

2018-109A

Launched

2018-12-23

site code AFETR

Orbit

MEO

Constellation

GPS

Who

Owner / operatorUS Air Force Space and Missile Center

ManufacturerLockheed Martin Space Systems (Denver), Astronautics Operations

CountryUnited States

Catalogue owner codeUS

Orbit

OrbitingEarth

Orbit classMEO

Perigee20,072 km

Apogee20,292 km

Inclination55.78°

Period718 min

Radar cross-section—

Latest Orbital Elements

Epoch (UTC)2026-11-09 02:23:17

Mean motion2.00566891 rev/day

Eccentricity0.0041508

Inclination55.7819°

Right ascension of node86.4725°

Argument of perigee197.1611°

Mean anomaly160.9881°

B* drag term0.0000e+0

Element set999

Revolutions at epoch5,797

Mean elements (OMM) for the SGP4 model, refreshed every 6 hours. They describe the orbit at the epoch shown and drift as time passes, fastest for low orbits.

Source: CelesTrak satellite catalogue and GP data (celestrak.org); owner and manufacturer from GCAT (J. McDowell, CC BY 4.0).