http://www.youtube.com/watch?v=1_Y6L9-VmK8

Supposed to do something on January 29th?

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Interesting presentation. I'm curious why main stream astronomers aren't making a bigger deal out of it.

The orbital path bit at the end is a bit shocking. That is a seriously close fly-by if that's accurate.

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I was trying to find more info on this one, and I see something is supposed to actully plow into Mars on the 30th.

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport

It'll come so close to earth that you'll need a telescope to see it...

http://www.sciencedaily.com/releases/2008/01/080124192818.htm

For those of us in Cali, the big star will sort of interfere with the telescope viewing of TU24.

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It's happen before and will happen again.
Good tunes also.

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Supposed to pass within 334,000 miles of earth... My former 85 300TD could have driven out to see it and part of the way back!

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Because it's nothing unusual. You're not going to see anything unless you have a decently sized telescope and even then the only thing you will see is a small point of light moving against the background stars.

Mainstream astronomers typically avoid getting involved with the theories of whackjobs. The return on investment is so vanishingly small.

- Peter.

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....But when you're right, you're really right. Except no one is around to notice.

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-livin' in the terminally flippant zone

They can't do any better than a 334,000 projection field? A direct hit is within 334,000.

I'm going spelunking for info.

Oooops! I misread your post. MY bad.

The orbit will be about 334,000 miles away. That's outside the lunar orbit.
http://www.badastronomy.com/bablog/2008/01/21/repeat-after-me-asteroid-2007-tu24-is-no-danger-to-earth/

Bot

..................

Asteroid To Make Rare Close Flyby Of Earth January 29
ScienceDaily (Jan. 25, 2008) — Scientists are monitoring the orbit of asteroid 2007 TU24. The asteroid, believed to be between 150 meters (500 feet) and 610 meters (2,000 feet) in size, is expected to fly past Earth on Jan. 29, with its closest distance being about 537,500 kilometers (334,000 miles) at 12:33 a.m. Pacific time (3:33 a.m. Eastern time). It should be observable that night by amateur astronomers with modest-sized telescopes.

So is that one big enough to end life as we know it here if it hits earth?

Tom W

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..I also have a 427 Cobra replica with an aluminum chassis.

assuming an ellipsoid, the volume is about 230,000 m^3
(4*610^2 * 150 * 3.1415/3)

Mean density of asteroids = 2,650 Kg/m^3

Mass of asteroid is about
609,500,000 Kg

velocity = 3,500 m/sec

Kinetic energy
E = mv^2/2

E = (609,500,000 X 3,500^2)/2

E = 3.7 X 10^15 joules

The Hiroshima bomb was a 20kT explosion releasing 8X10^13 joules

So the asteroid would be like 100 Hiroshima blasts or a 2 megaton bomb. The USSR busted one that was 50mT which would be considerably larger than the asteroid and we did okay after that.

I think the planet killer is supposedly several cubic kilometers in volume which is at least 10 times the size of this asteroid.

I knew I could count on you B.

The number of impact craters around the planet is pretty astounding.

I have visited the Meteor crater in Az twice. My favorite may be that one in canada where they mine (nickel?) from the meteorite long ago buried there.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I was sorta leaning that way. I have a hard time imagining how the matter that asteroids are made up could be THAT much different from the matter that composes this planet. We're a large collection of many asteroids, after all, best I can tell.

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IIRC, most of the asteroids close to us are iron/nickel, in a pretty refined form. Hence the idea that some have had of mining asteroids. Not really economical now for iron/nickel, but maybe so if there were some pure gold or platinum. Lots of SF stories about that.

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-livin' in the terminally flippant zone

I figured out once how much the gold that a shuttle could carry would be worth, not gold ore but pure gold. I seem to recall about half a $billion.

Bringing the ore back to the planet, intact as opposed to scattered randomly in smoking handfuls, would be enormously expensive.

It's a pipe dream.

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