What Happens When Satellites Fall

Artist Interpretation of a GPS satellite.
Source: image courtesy of NASA

From Yahoo News/Space.com:

The recent trials of an out-of-control communications satellite and a defunct, leaky Soviet-era spacecraft toting its own nuclear reactor call up the question: What exactly happens when satellites die in space?

There are actually a few possibilities, some good, and others not so much.

Bury the dead

If mission controllers spot a glitch in time, they can force a still-functioning satellite to fire its engines and reach a so-called "graveyard orbit" a few hundred miles above its initial flight path in order to safeguard its neighboring spacecraft against possible damage.

That's what engineers are trying to do for the telecommunications satellite Astra 5A, which inexplicably failed on Jan. 15 after 12 years of operation. The satellite has since been adrift in space, moving out of its geostationary position about 22,300 miles (35,888 km) above Earth and is moving eastward along its orbital arc.

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