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Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 04:10
by Hugo.
A visualisation of an asteroid's path of orbit which nearly collided with the Earth and Moon in 2003. Apparently, part of a NASA rocket.
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 04:13
by Verbal
fucking dinosaurs innit
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 04:22
by Hugo.
Haha you fucked a dinosaur. Youre GAY.
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 04:27
by rhino
so close. too bad
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 05:02
by zim
lavabug signal
could a somewhat accurate path of this be predicted after observing it after a few rotations?
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 05:04
by Verbal
fucking general relativity innit
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 08:13
by TamPron
wowzers.
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 13:21
by Abzu
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 15:07
by FUKKET
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 17:07
by Lavabug
That's awesome.
[quote name="zim"]lavabug signal
could a somewhat accurate path of this be predicted after observing it after a few rotations?[/quote]
Depending on how far into the future you want to look, a very accurate path could be determined with even less information than that, provided the observations/measurements of the object's velocities and distances to the earth had low uncertainties, and effects between the moon and asteroid were negligible.

At the end where the thing flies off after a close moon encounter, the latter probably doesn't hold up.
Classical mechanics is a relatively predictable cunt, innit.
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 17:15
by zim
very cool
i seriously need to get my ass in gear with some math and physics
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 17:50
by Hugo.
Yeah neptune was predicted before it was actually seen because of perturbations in neptunes movement. ie Neptune wasn't where it was 'supposed' to be according to dem physics.

Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 17:56
by Ninny
[youtube]ktrtvCvZb28[/youtube]
This year Rosetta will land on a comet!

Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 17:56
by Lavabug
The only thing about the Solar system that wasn't predicted by Newtonian physics was the precession of the perihelion of Mercury's orbit. There was a stupidly small disagreement with theory and observation. Up until GR was developed, which accounted for it with extreme precision. That Einstein okahoma slamma kept shit real.
Re: Asteroid which nearly hit earth in 2003
Posted: 05 Jan 2014, 23:09
by Abzu
Einstein

Re: Asteroid which nearly hit earth in 2003
Posted: 06 Jan 2014, 01:54
by droidspawn
[quote name="Abzu"]Einstein

[/quote]
Re: Asteroid which nearly hit earth in 2003
Posted: 06 Jan 2014, 19:00
by Hugo.
[quote name="Lavabug"]
The only thing about the Solar system that wasn't predicted by Newtonian physics was the precession of the perihelion of Mercury's orbit. There was a stupidly small disagreement with theory and observation. Up until GR was developed, which accounted for it with extreme precision. That Einstein handsome leprechaun kept shit real.[/quote]
They predicted the sun this way?

Re: Asteroid which nearly hit earth in 2003
Posted: 06 Jan 2014, 23:36
by Lavabug
Going into pedantic-as-fuck land, I should have said the only thing about Solar system's translational planetary motions.
The weird direction of Neptune's (and Mercury's?) rotation axis is explained with past collision events, but this has no bearing on their translational motions.
Re: Asteroid which nearly hit earth in 2003
Posted: 06 Jan 2014, 23:40
by agony bagony
that animation is quite pretty
Re: Asteroid which nearly hit earth in 2003
Posted: 07 Jan 2014, 00:07
by Hugo.
The phenomenon where co-orbits sync up enough to throw one body out of orbit is called orbital resonance.
One of my favourite terms.

Re: Asteroid which nearly hit earth in 2003
Posted: 07 Jan 2014, 00:08
by zim
Re: Asteroid which nearly hit earth in 2003
Posted: 07 Jan 2014, 00:41
by Lavabug
Here's a really good "freeware" book on the subject if any of you are curious, accessible if you know the basics of vectors and calculus:
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http://farside.ph.utexas.edu/teaching/c ... estial.pdf<!-- m -->
Re: Asteroid which nearly hit earth in 2003
Posted: 07 Jan 2014, 00:58
by agony bagony
[quote name="Hugo."]The phenomenon where co-orbits sync up enough to throw one body out of orbit is called orbital resonance.
One of my favourite terms.

[/quote]
better known as "a really bad breakup"
Re: Asteroid which nearly hit earth in 2003
Posted: 09 Jan 2014, 06:38
by TamPron