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General >> Discussion >> Asteroids in 3:2 resonance with Earth
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Message started by frankuitaalst on 03/14/10 at 02:24:21

Title: Asteroids in 3:2 resonance with Earth
Post by frankuitaalst on 03/14/10 at 02:24:21

In the Near Earth Objects database http://neo.jpl.nasa.gov/cgi-bin/neo_elem I've selected two large asteroids having a period of 1.50 years , hoping they show a resonating behaviour .
In this animation (in rotating frame on Earth )over about 400 years 2005 GP21 (in red )and 2000 LY27 (in green) indeed show a librating resonance to Earth .  
It may look as if both asteroids once have the same orbit . This isn't the case . In fact they are in counter phase .

Title: Re: Asteroids in 4:3 resonance with Earth
Post by frankuitaalst on 03/20/10 at 08:51:16

Using the same approach I've found the two asteroids 2005 UM5 in green and Orpheus in red having a 4:3 resonace with Earth .
The following animation shows the path in rotating frame to Earth . Each frame covers 4 years .

Title: Asteroids in 1:1 resonance with Earth - coorbitals
Post by frankuitaalst on 04/12/10 at 13:02:51

Currently there are about 10 known asteroids having a period of about 1 year .
Only two of them 2004 GU9 and 2006 FV35 seem to be locked in resonance around  Earth.
Others , as Cruitne are in a horseorbit around Earth .
Hereunder is an animation of 2004 GU9 and 2006 FV35 covering 200 years from now in rotating frame to Earth .

Title: Coorbitals to Earth
Post by frankuitaalst on 04/14/10 at 12:11:33

Just for completeness of the above post : here's a selection of all the NEA which are catalogued by NEO as having a period of 1.00 Earth years ( I don't know how 1.00 is  rounded ) . There are 10 of them .
The sim was run for 100 years from now.
I'm sure more will be detected in the next decades , because all of them start their orbit close to Earth .

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