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INCOMING!, Detection and observation of Earth-approaching asteroids.
jasedm
post Oct 27 2010, 02:22 PM
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QUOTE (SFJCody @ Oct 11 2010, 08:53 AM) *
Same. If it's under 20m in diameter bring it on! smile.gif


It would be great to have a ringside seat for a nearside moon impact of something of this size (or bigger), a bit scary being underneath something headed for earth though. ohmy.gif

Incidentally, an interesting calculator of local and global effects of impactors can be found here

It's a program whereby you can enter different parameters for the incoming body (size, density, velocity etc) and the program generates information on the impact effects.

Ghoulish, but fun..

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Holder of the Tw...
post Feb 5 2011, 06:08 AM
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A small rock (about four feet across, or a meter to a meter and a half) just skimmed by the earth. It was spotted and tracked several hours before closest approach.

JPL report link
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tasp
post Feb 5 2011, 03:56 PM
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Interesting.

A ring side seat watching an object shift from an Apollo asteroid orbit to an Aten class.

60 degree deflection upon encountering earth's gravity!
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jasedm
post Feb 5 2011, 10:51 PM
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It never ceases to amaze me that despite 4.6 billion years of accretion, there are still a prodigious number of pieces of junk out there. Inevitable I suppose that the on-going sky surveys will pick up a frighteningly large rock heading our way - just a question of when..

blink.gif
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ngunn
post Feb 9 2011, 10:23 AM
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QUOTE (tasp @ Feb 5 2011, 03:56 PM) *
A ring side seat watching an object shift from an Apollo asteroid orbit to an Aten class.


Given that it will now have a lower perihelion I wonder if it will develop a tail?
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Holder of the Tw...
post Jun 24 2011, 05:00 AM
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Another small rock to pay a close visit in a few days.

JPL report
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claurel
post Jun 27 2011, 04:56 PM
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QUOTE (Holder of the Two Leashes @ Jun 23 2011, 10:00 PM) *
Another small rock to pay a close visit in a few days.

JPL report


Close approach in about 5 minutes!

Here's an animation I made that shows the encounter from the asteroid's point of view:
http://www.youtube.com/watch?v=AkBFNOah4q0

Itokawa standing in for 2011 MD, and a WAG for the rotation state.

--Chris
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ElkGroveDan
post Jun 27 2011, 05:01 PM
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Nice work. Thanks for creating that.


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If Occam had heard my theory, things would be very different now.
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jasedm
post Jun 27 2011, 05:08 PM
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Outstanding! Thanks for that Claurel.
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Bunker9603
post Jun 28 2011, 02:57 AM
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That is a great animation! I looked at your other videos and they are all very nice...I am also your newest subscriber!
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walfy
post Jun 28 2011, 03:04 AM
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Excellent animation!
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SolarSystemRubbl...
post Sep 26 2011, 10:38 PM
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NASA To Host News Conference On Asteroid Search Findings WASHINGTON -- NASA will hold a news conference at 1 p.m. EDT on Thurs., Sept. 29, to reveal near-Earth asteroid findings and implications for future research. The briefing will take place in the NASA Headquarters James E. Webb Auditorium, located at 300 E St. SW in Washington.

NASA's Wide-field Infrared Survey Explorer (WISE) mission, launched in December 2009, captured millions of images of galaxies and objects in space. During the news conference, panelists will discuss results from an enhancement of WISE called Near-Earth Object WISE (NEOWISE) that hunted for asteroids.

The panelists are:
-- Lindley Johnson, NEO program executive, NASA Headquarters, Washington
-- Amy Mainzer, NEOWISE principal investigator, NASA's Jet Propulsion Laboratory, Pasadena, Calif.
-- Tim Spahr, director, Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, Mass.
-- Lucy McFadden, scientist, NASA's Goddard Space Flight Center, Greenbelt, Md.

The event will air live on NASA Television and the agency's website. For NASA TV streaming video, downlink and scheduling information, visit:

http://www.nasa.gov/ntv

The briefing also will be streamed live, with a chat available, at:

http://www.ustream.tv/nasajpl2

For more information about the mission, visit:

http://www.nasa.gov/wise


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Paolo
post Sep 30 2011, 05:30 AM
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arXiv paper on NEOWISE results, presented at yesterday's press conf
NEOWISE Observations of Near-Earth Objects: Preliminary Results


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I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.

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Paolo
post Oct 14 2011, 05:34 PM
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a near miss in 1883?
Interpretation of the observations made in 1883 in Zacatecas (Mexico): A fragmented Comet that nearly hits the Earth
I tend to be skeptical of this kind of old visual obs, but well, who knows...


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I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.

James Van Allen
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PDP8E
post Oct 14 2011, 07:20 PM
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QUOTE (Paolo @ Oct 14 2011, 01:34 PM) *
a near miss in 1883? .... I tend to be skeptical of this kind of old visual obs, but well, who knows...


Seriously? Why would any scientist publish an article in ComicSans?
Especially one on very tenuous ground to begin with...



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