(meteorobs) New very interesting asteroid

Skywayinc at aol.com Skywayinc at aol.com
Mon May 25 20:26:53 EDT 2009


In a message dated 5/25/2009 12:59:07 P.M. Eastern Daylight Time,  
md6648 at mclink.it writes:
 

Yesterday was edited the circular

MPEC 2009-K39 : 2009  KC3

http://www.cfa.harvard.edu/mpec/K09/K09K39.html

2009 KC3 it's  a asteroid of around 1 Km in diameter with a MOID of 
0.00967772 AU and with  an very like comet orbit, the 1 and 2 September
2009 shall be of 15.4a and  the 24 and 25 August shall be at 0.049 U.A. 
from the  Earth

http://www.cfa.harvard.edu/iau/MPEph/MPEph.html

around 29  August the asteroid shall pass in the near same place where 
shall be the  Earth two day  after,

http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009+KC3+&orb=1

at  today the object it's only an asteroid but if it's a dormient comet
at the  end of August this year we can to have an outburst (probably
little) of slow  meteors.
The orbit it's calculated from an arc of only 20 days, then can  change
a little.
 

-------------------------------------------------------------
Here is what I came up with using the elements from MPEC 2009-K39 : 2009  
KC3
 
The asteroid will arrive at the ascending node of its orbit at 20:45 UT  on 
August 29 and the Earth will be closest to the node at 09:15 UT on  
September 2 (3.52 days after the asteroid).  The distance separating  the two 
orbits at that time will be 0.014 AU.  


Interestingly, going backwards in time, the asteroid's perihelion distance  
and orbital period seems to increase; a century ago perihelion may  have 
been ~0.17 AU larger and its period ~0.4 year longer.  Around  1989, the orbit 
of Earth and the asteroid virtually intersected at the  node.  Looking 
ahead in time, the asteroid's perihelion distance and  orbital period will once 
again increase.  In 2109 perihelion may  be ~0.18 AU larger and its period 
~0.4 longer. 
 
In 2028, the asteroid arrives at the node about 20-days AFTER the  Earth.
 
Anybody else have anything to add?
 
If there is any material trailing behind 2009 KC3, it appears that the best 
 time to look for any associated meteor activity would be on the morning of 
 September 2.  
 
Roberto . . . did you calculate a possible radiant?
-- joe rao


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