Author Topic: LIVE: 2012 DA14 - NEO Encounter Mission  (Read 16174 times)

Offline Chris Bergin

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #40 on: 02/15/2013 06:24 PM »
50 Seconds!!



Offline Chris Bergin

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #43 on: 02/15/2013 06:27 PM »
JPL did a very good job showing off their NEO office, etc. Sample return:

Offline Chris Bergin

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #44 on: 02/15/2013 06:27 PM »
And that's it for NASA TV - apart from:

Offline robertross

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #45 on: 02/15/2013 06:54 PM »
Thanks Chris.

We're still livin...until the next encounter!  LOL

NSF survives, yay!
« Last Edit: 02/15/2013 06:55 PM by robertross »
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Offline Moe Grills

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #46 on: 02/15/2013 09:36 PM »
Thanks Chris.

We're still livin...until the next encounter!  LOL

NSF survives, yay!

There's no guarantee you'll wake up tomorrow, or the day after.
You need to take a course in philosophy.
BTW, there are thousands of Russians now traumatized because
of the 'coincidences' today.

Offline kevin-rf

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #47 on: 02/16/2013 12:10 AM »
NSF survives, yay!
Moral of the story, Chris don't take that hosting contract in Chelyabinsk ;)
If you're happy and you know it,
It's your med's!

Offline Chris Bergin

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #48 on: 02/16/2013 03:27 AM »
Always been Texas hosted :)

Meanwhile........

Slightly leftfield, but rather than repeating what's already out there with these Friday events, focused on the future missions:

Asteroid close pass highlights need to investigate NEAs via NASA missions:
http://www.nasaspaceflight.com/2013/02/asteroid-highlights-investigate-neos-nasa-missions/

Offline JohnFornaro

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #49 on: 02/16/2013 03:27 PM »
13 mins to impact closest approach.

I fell off the ol' armchair laughing at that one!  Thanks.
Sometimes I just flat out don't get it.

Offline Ben the Space Brit

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #50 on: 02/16/2013 03:30 PM »
There's a couple of bits of data that I'm hoping will get some publicity.

1) The degree to which 2012 DA14's orbit was perturbed by the encounter with the Earth/Moon system's gravitational pull (might help us fine-tune density estimates and make deducing its composition easier);

2) Did the asteroid shed any fragments (there is a theory that many small NEOs are 'piles of rubble' held together by mutual gravity.  The stronger gravity of the Earth might have pulled some bits off, altering the final orbit of 2012 DA14 as well as adding chaotic elements into calculating its future orbit).
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Offline ChileVerde

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #51 on: 02/17/2013 04:32 PM »
There's a couple of bits of data that I'm hoping will get some publicity.

1) The degree to which 2012 DA14's orbit was perturbed by the encounter with the Earth/Moon system's gravitational pull (might help us fine-tune density estimates and make deducing its composition easier);

2) Did the asteroid shed any fragments (there is a theory that many small NEOs are 'piles of rubble' held together by mutual gravity.  The stronger gravity of the Earth might have pulled some bits off, altering the final orbit of 2012 DA14 as well as adding chaotic elements into calculating its future orbit).

1) For something that much lighter than the Earth and Moon, the orbital perturbation would not detectably depend on its mass.

2) That's an interesting possibility, and the radar folks are looking closely for signs of a variety of such effects.
"I canít tell you which asteroid, but there will be one in 2025," Bolden asserted.

Offline simonbp

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #52 on: 02/17/2013 05:25 PM »
Rubble piles probably wouldn't shed material unless they get closer than the Roche limit, which to the first order would 1.26 Earth radii, so 1700 km altitude. That's quite a bit higher than the altitude of DA14 at perigee, so not likely.

The tidal forces did probably "puff up" the asteroid, weakening it structurally, and making it more rubble-pile-y. That also probably resorted a lot of small rubble to the surface, making the "pools" of gravel that were seen on Eros and Itokowa.
« Last Edit: 02/17/2013 05:28 PM by simonbp »

Offline Targeteer

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #53 on: 02/19/2013 03:27 PM »
Any word on when NASA will release radar images planned for collection from Goldstone?
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Hungry4info3

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #54 on: 02/19/2013 04:27 PM »
Any word on when NASA will release radar images planned for collection from Goldstone?

http://www.oosa.unvienna.org/pdf/pres/stsc2013/2013neo-05E.pdf

Online catdlr

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #55 on: 02/19/2013 07:15 PM »
Early Radar Observations of Asteroid 2012 DA14

Published on Feb 19, 2013
Radar observations of asteroid 2012 DA14 generated from data obtained by NASA's Goldstone Solar System Radar on Feb. 15-16, 2013. During the observations, the space rock's distance increased from 74,000 to 195,000 miles (120,000 to 314,000 km) from Earth.

The movie is comprised of 73 radar "images" looped nine times.

Resolution is 4 meters per pixel.

Credit: NASA-JPL/Caltech

Tony De La Rosa

Offline Targeteer

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Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #56 on: 02/19/2013 07:24 PM »
Thanks to both for the postings.
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Chris Bergin

Re: LIVE: 2012 DA14 - NEO Encounter Mission
« Reply #57 on: 02/21/2013 01:35 PM »
This is going around the exploration troops at NASA :)

Offline simonbp


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