Solar System
Dynamics
Group 		(29075) 1950 DA

Asteroid (29075) 1950 DA was discovered on February 23, 1950 by Carl A. Wirtanen at Lick Observatory. It was observed for 17 days and then lost for half a century. An object discovered on December 31, 2000 and provisionally designated as 2000 YK66 was next recognized as 1950 DA. Asteroid 1950 DA made a close approach to the Earth in 2001 coming to within 7.8 million km. Radar image taken at the Goldstone and Arecibo observatories from March 3 to 7, 2001 (0.052 au; 22 lunar distances) showed that the asteroid has a mean diameter of 1.1—1.4 km. It will approach near to the Earth on March 16, 2880. The next opportunity for radar observations is in 2032.

Older results based on shorter arcs

Number of original observations: 498
Arc : 1950 02 22 - 2012 11 02
Nominal rms: 0″.34 (994 residuals)

Possible collisions in: 2880





Year: 2880


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
 		 20120930

28800309		 1.698215453
3.10
1.702704369		 0.508285339
0.11
0.513497794		 12.1747983
6.12
11.1320673		 356.7280622
3.35
344.9713046		 224.6135089
-0.25
239.0664903		 64.1562062
-8.90
337.9995357		 0″.36

 

Impact date: 2880 03 16.989 (UT)   Vimpact= 17.841 km/sec   Ψimpact = 2°.64  

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:

(29075) 1950 DA page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
(29075) 1950 DA page and Impact Risk page at the NEO Dynamic Site (NEODyS)




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