Solar System
Dynamics
Group 		1994 WR12

Asteroid 1994 WR12 was discovered on November 28, 1994 by C.S. Shoemaker at Palomar Montain.
This asteroid has led the Near Earth Objects (NEO's) list with close approaches to Earth over the next 100 years: on November 26, 2030 — 1994 WR12will approach the Earth at the distance of 0.0180 AU. It has a diameter of about 110—260 meters.

Number of original observations: 25
Arc : 1994 11 26 - 1994 12 31
Nominal rms: 0″.74 (49 residuals)

Possible collisions in: 2073, 2083





Year: 2073


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
 		 19950103

20731117		 0.757037047
0.70
0.757183826		 0.396813891
-0.70
0.396571183		 6.8517418
-0.70
6.8472421		 63.0674569
-0.58
61.8913196		 205.6840893
0.71
206.8201721		 185.3251376
0.70
114.1681647		 0″.75

 

Impact date: 2073 11 24.519 (UT)   Vimpact= 15.249 km/sec   Ψimpact = 48°.62  

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: 2083


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
 		 19950103

20831117		 0.757581922
-0.85
0.757949742		 0.395280996
0.85
0.395487442		 6.8138117
0.85
6.7802805		 63.0669503
0.96
61.7930207		 205.6919839
-0.85
206.8922573		 185.3875044
-0.85
113.4368377		 0″.77

 

Impact date: 2083 11 24.944 (UT)   Vimpact= 14.896 km/sec   Ψimpact = 17°.38  




External links:

1994 WR12 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
1994 WR12 and Impact Risk page at the NEO Dynamic Site (NEODyS)





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