[meteorite-list] NASA Can't Pay For Killer Asteroid Hunt

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Mon, 5 Mar 2007 16:38:36 -0800 (PST)
Message-ID: <200703060038.QAA08178_at_zagami.jpl.nasa.gov>

http://news.yahoo.com/s/ap/20070305/ap_on_sc/killer_asteroids;_ylt=ApVHfDEiKSEMivb7S4Ub7TRvieAA

NASA can't pay for killer asteroid hunt
By SETH BORENSTEIN
Associated Press
March 5, 2007

WASHINGTON - NASA officials say the space agency is capable of finding
nearly all the asteroids that might pose a devastating hit to Earth,
but there isn't enough money to pay for the task so it won't get done.

The cost to find at least 90 percent of the 20,000 potentially hazardous
asteroids and comets by 2020 would be about $1 billion, according to a
report NASA will release later this week. The report was previewed
Monday at a Planetary Defense Conference in Washington.

Congress in 2005 asked NASA to come up with a plan to track most killer
asteroids and propose how to deflect the potentially catastrophic ones.

"We know what to do, we just don't have the money," said Simon "Pete"
Worden, director of NASA's Ames Research Center.

These are asteroids that are bigger than 460 feet in diameter - slightly
smaller than the Superdome in New Orleans. They are a threat even if
they don't hit Earth because if they explode while close enough - an
event caused by heating in both the rock and the atmosphere - the
devastation from the shockwaves is still immense. The explosion alone
could have with the power of 100 million tons of dynamite, enough to
devastate an entire state, such as Maryland, they said.

The agency is already tracking bigger objects, at least 3,300 feet in
diameter, that could wipe out most life on Earth, much like what is
theorized to have happened to dinosaurs 65 million years ago. But even
that search, which has spotted 769 asteroids and comets - none of which
is on course to hit Earth - is behind schedule. It's supposed to be
complete by the end of next year.

NASA needs to do more to locate other smaller, but still potentially
dangerous space bodies. While an Italian observatory is doing some work,
the United States is the only government with an asteroid-tracking
program, NASA said.

One solution would be to build a new ground telescope solely for the
asteroid hunt, and piggyback that use with other agencies' telescopes
for a total of $800 million. Another would be to launch a space infrared
telescope that could do the job faster for $1.1 billion. But NASA
program scientist Lindley Johnson said NASA and the White House called
both those choices too costly.

A cheaper option would be to simply piggyback on other agencies'
telescopes, a cost of about $300 million, also rejected, Johnson said.

"The decision of the agency is we just can't do anything about it right
now," he added.

Earth got a scare in 2004, when initial readings suggested an 885-foot
asteroid called 99942 Apophis seemed to have a chance of hitting Earth
in 2029. But more observations showed that wouldn't happen. Scientists
say there is a 1-in-45,000 chance that it could hit in 2036.

They think it would mostly likely strike the Pacific Ocean, which would
cause a tsunami on the U.S. West Coast the size of the devastating 2004
Indian Ocean wave.

John Logsdon, space policy director at George Washington University,
said a stepped-up search for such asteroids is needed.

"You can't deflect them if you can't find them," Logsdon said. "And we
can't find things that can cause massive damage."
Received on Mon 05 Mar 2007 07:38:36 PM PST