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Within the moon's orbit by all accounts:-

http://www.universetoday.com/90650/aste ... an-impact/

Yes, it’s coming. Yes, it’s big. Yes, it will be even closer than the Moon. And yes… we’re completely safe.

The 400-meter-wide asteroid 2005 YU55 is currently zipping through the inner Solar System at over 13 km (8 miles) a second. On Tuesday, November 8, at 6:28 p.m. EST, it will pass Earth, coming within 325,000 km (202,000 miles). This is indeed within the Moon’s orbit (although YU55′s trajectory puts it a bit above the exact plane of the Earth-Moon alignment.) Still, it is the closest pass by such a large object since 1976… yet, NASA scientists aren’t concerned. Why?

Because its orbit has been well studied, there’s nothing in its way, and frankly there’s simply nothing it will do to affect Earth.

Slightly different to some of the stories I've read in the media, mostly ZOMG! Earthquakes caused by magnetic fields! etc.

While its obviously not going to hit us, anybody who can come up with footage of Obama, the Queen, or any other major world figure at or around the stated time of the asteroid's passing, gets a cookie

Batten Down the Hatches . . . .

Asteroid 2005 YU55 To Narrowly Miss Earth

http://www.huffingtonpost.com/2011/11/0 ... 2%7C110201

At its closest point, the space rock will be about 201,700 miles (324,600 kilometers) away, which is 0.85 the distance between the moon and the Earth. NASA says that the asteroid will reach this point at 6:28 p.m. EST on Tuesday.

"In effect, it'll be moving straight at us from one direction, and then go whizzing by straight away from us in the other direction," Benner said.

An asteroid this size -- which, according to Scientific American is larger than an aircraft carrier -- would cause widespread damage if it were to hit Earth, however. The Associated Press spoke to Jay Melosh, a professor of Earth and Atmospheric Sciences at Purdue University, who said that the asteroid would create a four-mile wide crater 1,700 feet deep. It could cause 70-foot tsunami waves and shake the ground like a magnitude-7 earthquake.


Interesting.

Are object like this often inside the orbit of the moon?

ANCFlyer wrote:Are object like this often inside the orbit of the moon?

http://neo.jpl.nasa.gov/risk/index_d.html

JeffSFO wrote:

ANCFlyer wrote:Are object like this often inside the orbit of the moon?

http://neo.jpl.nasa.gov/risk/index_d.html

Cool. Thanks for that Jeff.

Why doesn't YU55 appear on the table? Did I miss something?

I'm gonna guess by the title, 2005 YU55, it was catalogued in 2005, so it would seem logical for it to appear in the table in the 2005s?

ANCFlyer wrote:

JeffSFO wrote:

ANCFlyer wrote:Are object like this often inside the orbit of the moon?

http://neo.jpl.nasa.gov/risk/index_d.html

Cool. Thanks for that Jeff.

Why doesn't YU55 appear on the table? Did I miss something?

I'm gonna guess by the title, 2005 YU55, it was catalogued in 2005, so it would seem logical for it to appear in the table in the 2005s?

I'm guessing that 2005 YU55 doesn't fit the bill as an impact risk (a miss is a miss) whereas all the others catalogued there could still, potentially, hit the Earth until additional calculations rule them out, they miss, or blammo.

However, it's on this list as it's a Near Earth Object on a close approach:

http://neo.jpl.nasa.gov/ca/

So that should help fill the gap about how many NEOs are inside the moon's orbit.