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2010 TK7 the Earths firsrt known Trojan (Read 5411 times)
frankuitaalst
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2010 TK7 the Earths firsrt known Trojan
07/28/11 at 12:34:52
 
Nice to come from holiday and see thiis discovery as communicated by EDG .  
Here's an animation of the first known Earths trojan .  
The animation covers 300 years and starts inn 2009 ; In this view the solarsystem is seen edge on .  
Earth is the littel moving dot near the center . To get some distance info I've added Mercury's orbit .  
I've created also  a bigger animation, combining the edge on and the above view , but the file is almost 2MB , so I cannot post it here.
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2010TK7Side.gif
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abyssoft
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Re: 2010 TK7 the Earths firsrt known Trojan
Reply #1 - 07/28/11 at 14:04:13
 
you should be able to post it Frankuitaalst. attachments can be up to 7.8 MB
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EDG
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Re: 2010 TK7 the Earths firsrt known Trojan
Reply #2 - 07/29/11 at 02:54:22
 
Nice Smiley
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(formerly known as Mal)
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frankuitaalst
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Re: 2010 TK7 the Earths firsrt known Trojan
Reply #3 - 07/31/11 at 03:32:33
 
Another representation of the orbit of 2010 TK7 :  
The viewpoint is a co-rotating point with Earth at a distance of 1AU from Earth , outwards .  
The camera looks down at Earth ( and the sun behind Earth ) .  
The animation starts in 2009 where the Trojan is close to Earth and then slowly goes away from Earth , going "behind the sun" .  
One can best imagine the closed orbit as being a patatoe chip which rotates away from Earth .
Try to imagine , it helps.  
The animaton covers 390 years which seems to be the oscillation period .
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2010TK7AnimfromCorotating.gif
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frankuitaalst
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Re: 2010 TK7 the Earths firsrt known Trojan
Reply #4 - 07/31/11 at 05:56:51
 
Here's the evolution over one oscillation period (390 years) of some orbital paramaters of our Trojan .
The orbit seems relatively stable when the asteroid is at the other side of the sun .  
When it is near Earth the Sma drops and rises very quickly .  
This corresponds with the animation .  
The eccentricity isn't quite harmonic , as the eccentricity does not end at the same level where it started .
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2010TK7Evolution.jpg
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