Asteroid which nearly hit earth in 2003

Hugo. · Post by **Hugo.** » 05 Jan 2014, 04:10

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.

Verbal · Post by **Verbal** » 05 Jan 2014, 04:13

fucking dinosaurs innit

Hugo. · Post by **Hugo.** » 05 Jan 2014, 04:22

Haha you fucked a dinosaur. Youre GAY.

rhino · Post by **rhino** » 05 Jan 2014, 04:27

so close. too bad

zim · Post by **zim** » 05 Jan 2014, 05:02

lavabug signal

could a somewhat accurate path of this be predicted after observing it after a few rotations?

Verbal · Post by **Verbal** » 05 Jan 2014, 05:04

fucking general relativity innit

TamPron · Post by **TamPron** » 05 Jan 2014, 08:13

wowzers.

Abzu · Post by **Abzu** » 05 Jan 2014, 13:21

FUKKET · Post by **FUKKET** » 05 Jan 2014, 15:07

http://en.wikipedia.org/wiki/J002E3

Lavabug · Post by **Lavabug** » 05 Jan 2014, 17:07

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.

zim · Post by **zim** » 05 Jan 2014, 17:15

very cool

i seriously need to get my ass in gear with some math and physics

Hugo. · Post by **Hugo.** » 05 Jan 2014, 17:50

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.

Ninny · Post by **Ninny** » 05 Jan 2014, 17:56

[youtube]ktrtvCvZb28[/youtube]

This year Rosetta will land on a comet!

Lavabug · Post by **Lavabug** » 05 Jan 2014, 17:56

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.

Abzu · Post by **Abzu** » 05 Jan 2014, 23:09

Einstein

droidspawn · Post by **droidspawn** » 06 Jan 2014, 01:54

[quote name="Abzu"]Einstein

[/quote]

Hugo. · Post by **Hugo.** » 06 Jan 2014, 19:00

[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?

Lavabug · Post by **Lavabug** » 06 Jan 2014, 23:36

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.

agony bagony · Post by **agony bagony** » 06 Jan 2014, 23:40

that animation is quite pretty

Hugo. · Post by **Hugo.** » 07 Jan 2014, 00:07

The phenomenon where co-orbits sync up enough to throw one body out of orbit is called orbital resonance.

One of my favourite terms.

zim · Post by **zim** » 07 Jan 2014, 00:08

Lavabug · Post by **Lavabug** » 07 Jan 2014, 00:41

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:

http://farside.ph.utexas.edu/teaching/c ... estial.pdf

agony bagony · Post by **agony bagony** » 07 Jan 2014, 00:58

[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"

TamPron · Post by **TamPron** » 09 Jan 2014, 06:38

Asteroid which nearly hit earth in 2003

Asteroid which nearly hit earth in 2003

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