INCOMING!, Detection and observation of Earth-approaching asteroids. |
INCOMING!, Detection and observation of Earth-approaching asteroids. |
Oct 7 2008, 01:58 AM
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#31
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Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
Here's a Celestia simulation of 2008 TC3's entry into Earth's atmopshere: http://www.youtube.com/watch?v=4FW3oaZgCz0 Judging from that clip, 2008TC3 is gonna come down at / explode over the Nubian Desert, somewhere in the center of the triangle made up by the cities Wadi Halfa, Atbara & Port Sudan. Man, I flew over there some years ago! EDIT: The Horizons system is very slow ... must have a lot of traffic! -------------------- |
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Oct 7 2008, 02:00 AM
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#32
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
Going to? Has it already? Or did I again get my math wrong with time conversions? Lol.
-------------------- -- Hungry4info (Sirius_Alpha)
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Oct 7 2008, 02:23 AM
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#33
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Going to? Has it already? Or did I again get my math wrong with time conversions? Lol. The time given was 10:46 EDT (my time zone). It is now 10:19 EDT. I plan to go outside....we are far too far away, but I figure that just in case it has some smaller cousins, it couldn't hurt to go take a look. -------------------- |
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Oct 7 2008, 02:31 AM
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#34
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Junior Member Group: Members Posts: 35 Joined: 28-September 05 From: Seattle, WA Member No.: 514 |
Here's a Celestia simulation of 2008 TC3's entry into Earth's atmopshere:
http://www.youtube.com/watch?v=4FW3oaZgCz0 The green circle indicates the region where the asteroid is visible over the horizon. The trajectory of 2008 TC3 was taken from HORIZONS (about an hour ago.) This video gives the view from 2008 TC3: http://www.youtube.com/watch?v=Cxa2PUluqVU (Itokawa is standing in for 2008 TC3.) The Celestia add-on used for both simulations is here: http://www.shatters.net/~claurel/celestia/...ids/2008tc3.zip It requires a very recent version of Celestia, however; I'll make a more widely usable available post-impact. --Chris |
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Oct 7 2008, 02:32 AM
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#35
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
I will take the liberty of posting this quote from Emily's blog over at Planetary.org:
"Thanks to Ron Baalke for posting the following, from JPL asteroid scientist Paul Chodas, on the Minor Planets Mailing List: Update - 6:45 PM PDT (1 hour prior to atmospheric entry) Since its discovery barely a day ago, 2008 TC3 has been observed extensively by astronomers around the world, and as a result, our orbit predictions have become very precise. We estimate that this object will enter the Earth's atmosphere at around 2:45:28 UTC and reach maximum deceleration around 2:45:54 UTC at an altitude of about 14 km. These times are uncertain by +/- 15 seconds or so. The time at which any fragments might reach the ground depends a great deal on the physical properties of the object, but should be around 2:46:20 UTC +/- 40 seconds." Well, the asteroid has passed into the earth's shadow, so telescope observations are at an end now. Just waiting for the fireworks ... |
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Oct 7 2008, 02:40 AM
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#36
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
As 2008 TC3 passes over Niger, let's us have a moment of silence for this little asteroid that could. 2008 TC3 started life when it was freed from sub-surface of a larger asteroid. For millions of years it wondered. Unloved. Uncared for. Unnoticed. Now, as it's end approachs, in a fiery burst of light, people care for this little guy.
God speed little doodle. Now at 1,900 km above north africa. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 7 2008, 02:50 AM
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#37
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
And the earth emits a contented belch.
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Oct 7 2008, 02:50 AM
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#38
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
Well that was that....it would seem. Looks like we're all still here! I doubt anyone caught it. It hit news outlets so late in the day and it's almost 3am there. Even with seemingly everybody these days having a cameraphone on them... still doubtful.
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Oct 7 2008, 02:51 AM
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#39
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
At last check, Earth still here.
2008 TC3...not so much -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 7 2008, 02:53 AM
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#40
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
my mistake, nearly 5am local time rather than 3 UTC.
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Oct 7 2008, 02:57 AM
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#41
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Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
I can confirm that Australia is still here as well at 1:55 PM Sydney summer time ... and I couldnt even put up a realtime simulation (I was 4 minutes late) [at least the decision whether to use Earth Received Time or Space Object Event Time would have been easy this time around]. Just imagine this had been a very dark 'biggie' - the stock markets wouldn't even had time to crash further
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Guest_Bobby_* |
Oct 7 2008, 03:48 AM
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#42
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Guests |
Any Videos or Photos of the event yet???
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Oct 7 2008, 03:57 AM
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#43
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Member Group: Members Posts: 356 Joined: 12-March 05 Member No.: 190 |
here you go!
------------------* is breathtaking, no? |
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Guest_jumpjack_* |
Oct 7 2008, 07:49 AM
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#44
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Guests |
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Oct 7 2008, 08:33 AM
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#45
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
SpaceWeather.com has news about a possibly positive sighting (from a plane at roughly 750 nm away) of a flash at around the expected time of impact.
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