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Asteroids (Read 146765 times)
frankuitaalst
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Asteroids close aproaches to Earth Okt 2010
Reply #210 - 10/18/10 at 22:42:33
 
Recently Earth got 4 visitors within 1 Lunar Distance :  
 
2010 RF12
2010 UE
2010 TE55
2010 TG19
 
The animation was generated with a timeframe of 1 day  
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4closepassesOkt2010.gif
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frankuitaalst
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Re: Asteroids Okt 2010
Reply #211 - 10/18/10 at 23:07:25
 
I see I overlooked one : 2010 TD54 .  
Here's the total picture
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PicN_KM_3closepassesokt2010_Earth__01012009_dat_1004.jpg
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frankuitaalst
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Re: Asteroids : 2005 YU55 close approach
Reply #212 - 03/14/11 at 10:55:43
 
According to the neo site : http://neo.jpl.nasa.gov/news/news171.htm the asteroid 2005YU55 , some 400 m in diameter will make a close appraoch wihin the Lunar distance in november this year .  
 
Hereunder is an animation from different viewpoints depicting this event .  
 
the first frames show the approach as seen from the sun in a 2 field . The asteroid comes from the right , comes near and then "returns" going upwards to continue its orbit . The reversal is due to the fact that the angular velocity of the asteroid becomes smaller than earths angular velocity .  
the second frames show the asteroid as seen from above , centered on earth . Each dot represents 0.5 hours .  
the last part gives an overview of the solar system showing the effect of the close approach on the asteroids orbit .  
 
Clicking on the frame in the link also starts an animation which is also worthwile viewing ....
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2005_YU55_close_approach_.gif
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frankuitaalst
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Asteroid 2011MD close approach to Earth
Reply #213 - 06/23/11 at 12:52:33
 
Asteroid 2011MD will make a cloes pass to Earth on 27th june , within 0.05 LD .  
Here's a screenshot showing the path in yellow , relative to Earth.  
Earth is marked with the white line . In this view the asteroid moves upward.
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PicN_KM_2011MD__01012009_dat_1249.jpg
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Re: Asteroids
Reply #214 - 06/23/11 at 19:08:17
 
Here's a .gsim of 2011 for anyone who wants to play with this asteroid (or perhaps space junk).  It's amazing how close this thing gets!
http://www.orbitsimulator.com/gravity/simulations/2011MD.gsim
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frankuitaalst
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Asteroid 2011MD
Reply #215 - 06/25/11 at 03:25:03
 
Thanks Tony for the gsim .  
I believe if the orbit changes color then the object is under the ecliptic ? Am I right ?  
 
I've run the sim in 3D also .  
Here's a screenshot as viewed from the suns perspective .  
In this view the asteroid comes from the right above and leaves Earth to the left above .  
One pixel represents one hour .  
It is obvious how the asteroid is accelerated as he approaches Earth . A very nice slingshot !  
At closest encounter its speed is about 90 in two hours ; this will be hard to follow by telescope
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« Last Edit: 06/25/11 at 06:34:02 by frankuitaalst »  

PicN_KM_2011MD__01012009_dat_12493.jpg
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Tony
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Re: Asteroids
Reply #216 - 06/25/11 at 11:35:00
 
I have a new LED monitor, and I'm not getting the 3d effect as well as on my old CRT.  Can you make a 3d animation?
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frankuitaalst
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Re: Asteroid 2011MD
Reply #217 - 06/26/11 at 01:20:16
 
Here's a 3D animation with viewpoint from sun .  
In reference of the previous picture I've optimized the parallax in order to get a better view . Increasing the parallax would result in a worser depth view as our eyes may have difficulties to get focus.  
I've noticed that in order to get a maximum effect its a good idea to have no screens open with a white texture.
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2011MD_close_pass_3D.gif
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Re: Asteroids
Reply #218 - 06/26/11 at 11:07:45
 
Thanks Frank.  I'm still having trouble.  Perhaps its the new monitor.
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frankuitaalst
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Re: Asteroid 2011MD
Reply #219 - 06/27/11 at 07:30:37
 
Please check out this site :  
http://www.frankdeboosere.be/nieuws/news2011/news2011.php
maintained by our national weather forecast man Frank De Boosere .  
Sigh , wished I had this software too lips sealed
 
Edit : I think the above animations come from this Rumanian site :  
http://sonkab.wordpress.com/2011/06/25/mic-asteroid-trece-pe-langa-terra/
 
Edit : originally this site may be the original : http://orbit.psi.edu/~tricaric/2011MD.html
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« Last Edit: 06/27/11 at 12:42:34 by frankuitaalst »  
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