Solar System
Dynamics
Group
2009 AL

Number of original observations: 25
Arc : 2009 01 01 - 2009 01 03
Nominal rms: 0″.45 (JPL/NASA) (50 residuals)

Possible collisions in: 2098, 2106





Year: 2098


Orbital elements of impact orbit for two dates (equ. J2000)

Epoch [TT] a [AU] e i [deg] Ω [deg] ω [deg] M [deg] rms
20090109
20980424
2.487267169
2.555376347
0.675345339
0.644707454
3.8951886
4.2068221
227.0496984
220.0712484
310.8995342
318.5169306
344.5708966
5.6013497
0″.49
 

Impact date: 2098 05 01.312(UT)   Vimpact= 16.538 km/sec   Ψimpact = 64°.23  

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: 2106


Orbital elements of impact orbit for two dates (equ. J2000)

Epoch [TT] a [AU] e i [deg] Ω [deg] ω [deg] M [deg] rms
20090109
21060424
2.484079348
2.521918245
0.674816331
0.639658594
3.8903818
4.3248911
227.0370356
219.5144096
310.8881909
318.7022669
344.5446496
5.5738490
0″.46
 

Impact date: 2106 05 01.853(UT)   Vimpact= 16.715 km/sec   Ψimpact =31°.13  



External links:

2009 AL page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
2009 AL page and Impact Risk page at the NEO Dynamic Site (NEODyS)




Solar System Dynamics & Planetology Group, 2009. All rights reserved