Close call for Sept 7/14 - 0.1 LD, 21m diameter

I've never seen two such near misses in such close proximity to each other, has anyone else?



Space weather page

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I know this is way out there, but is the reason behind these why we seem to have so many distractions going on in the media right now, all of which could be orchestrated? Gaza, Ukraine, ISIS (or whatever they are called now), NATO, nude pics.....divert us from the real issue?

a reply to: PlanetXisHERE

What real issue? That objects came close and had no chance to hit us?

originally posted by: OccamsRazor04
a reply to: PlanetXisHERE

What real issue? That objects came close and had no chance to hit us?

You haven't looked at the date.

It still hasn't arrived. (or passed). It's three days away. Not a end of life event if it were to impact, but would still FUBAR a city if it were to hit one.

a reply to: TDawgRex

September the 7th: only point one lunar distance from Earth, and 21 meters large... I'd be a bit nervous.

a reply to: swanne

I did a sim on this site assuming the heaviest density at a 45 degree angle.

www.purdue.edu...

If it did impact, it would have a 10MT energy release and have no significant damage to the earth...except for those nearby of course.

If it plopped into a ocean somewhere with no islands around, we wouldn't even feel it, though I'm sure that it would provide some great YT videos upon entry. And it would be a BIG plop as well.

a reply to: PlanetXisHERE

Forgot I had this.

a reply to: FlyersFan

I know next to nothing about asteroids so I had to ask ATS: Even though one passed at .1 LD on August 31, it was 8 meters. Since this is 21 meters, is there a chance that because it's a bit heavier the Earth's gravity could pull it in?

Just speculating. Thanks

a reply to: FlyersFan

Ya, I guess 1/10th LD is about 38,400 km, which is a little over 3x the diameter of earth, definitely some room for error. I think I'd be a little more worried once any were (projected) within one earth diameter, about 0.032 LD.

I wonder what the closest any asteroid of any significant size has come without hitting? At what LD would an object be captured by the earth's gravity? I guess that would depend on the mass and speed of the asteroid.

a reply to: Yeahkeepwatchingme

Oh jeez, looks like you were writing the same question at the same time as me! Just off the top of my head, I'm guessing three earth diameters out would be too far, I would hazard a guess it would have to be at least less than one earth diameter, which as I said above is approx. 0.032 LD's.

Any impact in the sea would cause a huge tsunami. This could cause problems for nuke power stations situated by the sea as many of them are for their cooling needs.

We only have to remember Fukushima and what happened there and then realise that a tsunami like this may well overrun one or more power stations on the coast of any country nearby.

With the tools of even 15 years ago, we probably would not have known that any of these grazers were in the neighborhood.

The rate of observance goes up with the technology, so it is a difficult theory to say that the number of asteroids that we would normally come across, are increasing. The average for something like Chelyabinsk coming around is close to a century, so we (theoretically) , should not expect something like that, or larger, for a while. (I hope.)

originally posted by: charlyv
With the tools of even 15 years ago, we probably would not have known that any of these grazers were in the neighborhood.

The rate of observance goes up with the technology, so it is a difficult theory to say that the number of asteroids that we would normally come across, are increasing. The average for something like Chelyabinsk coming around is close to a century, so we (theoretically) , should not expect something like that, or larger, for a while. (I hope.)

Sure, technology has improved, and I'm sure our ability to see further out in the solar system has improved, but even two decades ago we would have noticed these asteroids at their closest approach to earth, and I'm sure we were recording all that came within a few LD's of earth.

well it might miss us... but how close is it to our moon?

originally posted by: TDawgRex

originally posted by: OccamsRazor04
a reply to: PlanetXisHERE

What real issue? That objects came close and had no chance to hit us?

You haven't looked at the date.

It still hasn't arrived. (or passed). It's three days away. Not a end of life event if it were to impact, but would still FUBAR a city if it were to hit one.

You are right, I didn't, there is no need to bother. It's not like the trajectory can't be determined, and it's not a big deal.