CAPE CANAVERAL — After four months of drama in space caused by a crippling failure of its main engine, a U.S. Navy’s mobile communications satellite has successfully rescued itself and achieved a usable orbit.
The Mobile User Objective System satellite No. 5, launched from Cape Canaveral on June 24 atop a United Launch Alliance Atlas 5 rocket, lost its primary orbit-raising engine just five days after reaching space.
The engine was supposed to fire 7 times over 9 days to push the Lockheed martin-built craft into a circular geosynchronous orbit 22,300 miles above the Earth, inclined at five degrees to the equator.
The satellite was launched into a customized high-perigee geosynchronous transfer orbit as planned, stretching from 2,379 by 22,219 miles at an inclination of 19.1 degrees.
With some maneuvering already accomplished before the main engine was lost, MUOS 5 lifted its perigee to around 9,471 miles and reduced inclination to 9.8 degrees, hobbyist observers tracking the satellite reported in early July. They were the first to notice and publicly reveal that the craft has suddenly stopped maneuvering.