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Iridium Satellite Reenters Atmosphere Over Arctic Ocean
By Andrew Bridges
Pasadena Bureau Chief
posted: 03:00 pm ET
29 November 2000

Contacting CORDS Dr

The first Iridium telecommunications satellite to reenter the atmosphere broke up over the Arctic Ocean early Wednesday.

The non-operational satellite reentered at 4:44 a.m. Eastern Standard Time (09:44 GMT), said Master Sgt. Larry Lincoln, of the United States Space Command, which tracks about 8,000 artificial objects orbiting the Earth, including spacecraft, satellites, rocket bodies and debris.

"The satellite was not designed to survive reentry intact and was expected to mostly burn up in the atmosphere," Lincoln said.

The satellite was launched September 8, 1998, but failed and was reported tumbling out of control just two months later.

A second Iridium satellite is expected to reenter the atmosphere no later than December 17.

As for the Chicken Littles of the world, they need not worry.

A study of the Iridium satellite reentries, show they are within a NASA and U.S. government standard of acceptable risk, said Nicholas Johnson, chief scientist and program manager for NASA’s orbital debris office at the Johnson Space Center in Houston, Texas. That is, there is a one-in-10,000 chance of anybody being hurt on the ground by a falling Iridium spacecraft, he told SPACE.com.
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   Multimedia

Watch a SPACE.com animation of an Iridium satellite deorbit

   Related Links

Center for Orbital and Reentry Debris Studies

Although the Iridium constellation will lose a few more satellites that are tumbling in orbit, the roughly 70 remaining operational birds have found their savior.

Earlier this month, the U.S. Bankruptcy Court for the Southern District of New York approved Iridium Satellite LLC’s bargain-basement $25 million bid to purchase the operating assets of Iridium LLC and its subsidiaries.

Motorola, builder and initial operator of the $7 billion constellation of Iridium satellites will provide subscriber equipment for users of the worldwide satellite network. The Boeing Co. will operate and maintain the satellites.


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