Solar System
Dynamics
Group 		1997 XR2
older result



Number of original observations: 149
Arc : 1997 12 04 - 1997 12 31
Nominal rms: 0″.59 (280 residuals)

Possible collisions in: 2101





Year: 2101


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
 		 19980127

21010524		 1.076718427
0.24
1.075260778		 0.201132793
0.08
0.200527444		 7.1710245
0.16
7.2251845		 250.9191989
-1.41
249.8176077		 84.5804844
2.08
84.9854578		 120.6056630
-0.19
289.6351550		 0″.60

 

Impact date: 2101 06 01.891 (UT)   Vimpact= 13.493 km/sec   Ψimpact = 11°.13  

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:

1997 XR2 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
1997 XR2 page and Impact Risk page at the NEO Dynamic Site (NEODyS)





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