Solar System
Dynamics
Group 		2011 AG5

Asteroid 2011 AG5 was discovered on January 8, 2011 by Mt. Lemmon Survey. It has a diameter of about 100—230 meters. The asteroid 2011 AG5 made a close pass (36.6 lunar distances, 0.0941 AU), travelling at 7.73 km/second, to the Earth-Moon system on the 24th February, 2011.

Older results based on shorter arcs

Number of original observations: 213
Arc : 2010 11 08 - 2011 09 21
Nominal rms: 0″.26 (423 residuals)

Possible collisions in: 2040, 2045





Year: 2040


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
 		 20111006

20400128		 1.430512724
-2.52
1.424934188		 0.390481296
-2.52
0.388792713		 3.6805337
-2.60
3.6973047 		135.7120874
0.95
135.4894059		 53.4755479
-1.55
54.2190979		 112.7372532
2.51
331.2654022		 0″.26

 

Impact date: 2040 02 05.158 (UT)   Vimpact= 14.367 km/sec   Ψimpact = 18°.27  

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.

Year: 2045


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
 		 20111006

20450128		 1.430513758
-3.12
1.406182436		 0.390481890
-3.15
0.383162386		 3.6805315
-2.37
3.7315262 		135.7121427
-0.69
135.4293321		 53.4754929
-0.20
55.4715052		 112.7371336
3.10
330.6065445		 0″.27

 

Impact date: 2045 02 04.423 (UT)   Vimpact= 14.410 km/sec   Ψimpact =31°.24  



External links:

2011 AG5 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
2011 AG5 page and Impact Risk page at the NEO Dynamic Site (NEODyS)




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