(meteorobs) Two Very close passages

[Roberto G.]

Today at 19.40 U.T. the asteroid 2011 CQ1
shall be at only 5.000 km from the Earth surface!
It has only some meters in diameter.

http://www.minorplanetcenter.net/mpec/K11/K11C12.html

 ~0.03(LD) - 0.00008(AU) or around 11855 km (geocentric).

(From data published in ML Comete)

The 26 July 2011 satellite Stereo B shall be very close
at the comet C/2010 X1 Elenin

http://secchi.nrl.navy.mil/STEREOorbit/C2010_X1.html 

Best greetings.
Roberto Gorelli