Solar System
Dynamics
Group 		2005 YU55

Asteroid 2005 YU55 was discovered on December 28, 2005 by Robert McMillan of the Spacewatch Program (Tucson Arizona). Radar image showed that the asteroid has a mean diameter of 0.4 km. It will pass within 0.85 lunar distances from the Earth on November 8, 2011.

Number of original observations: 776
Arc : 2005 12 24 - 2010 04 20
Nominal rms: 0″.26 (1539 residuals)

Possible collisions in: 2071





Year: 2071


Orbital elements of impact orbit for two dates (equ. J2000)
Epoch [TT] a [AU] e i [deg] Ω [deg] ω [deg] M [deg] rms
 
dev/σ
 		 20100504

20711101		 1.142761400
9.79
1.160963771		 0.429090028
-9.79
0.433683129		 0.5135624
-10.52
0.3779520		 39.3036072
6.74
45.9138308		 268.7917513
-10.05
262.3711380		 321.5488104
-1.28
41.3094202		 0″.28

 

Impact date: 2071 11 08.060 (UT)   Vimpact= 18.043 km/sec   Ψimpact = 9°.97  

dev/σ
Deviation from the nominal orbit parameter divided by the respective uncertainty.
Vimpact
The velocity of the asteroid relative to the Earth at the moment of impact.
Ψimpact
The impact angle is measured from the vertical axis that goes through the impact point. Thus, the impact angle is 0 degrees for a vertical impact.
rms
Root mean square for the derived impact orbit.


External links:

2005 YU55 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
(2005 YU55 and Impact Risk page at the NEO Dynamic Site (NEODyS)




Solar System Dynamics & Planetology Group, 2008. All rights reserved