Solar System
Dynamics
Group 		(29075) 1950 DA
older results

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 .

Results for September 2012


Number of original observations: 473
Arc : 1950 02 22 - 2012 09 04
Nominal rms: 0″.35 (940 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
3.22
1.702704384		 0.508285316
0.69
0.513497769		 12.1747914
8.67
11.1320609		 356.7280709
2.00
344.9713132		 224.6135012
0.51
239.0664832		 64.1562045
-7.24
337.9995056		 0″.39

 

Impact date: 2880 03 16.989 (UT)   Vimpact= 17.827 km/sec   Ψimpact = 4°.61  

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.


Older results (October 2010)


Number of original observations: 293
Arc : 1950 02 22 - 2010 10 04
Nominal rms: 0″.51 (581 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
 		 20101016

28800309		 1.699330253
3.36
1.702704323		 0.507510745
-0.67
0.513497883		 12.1810171
0.51
11.1321324		 356.7756685
0.80
344.9711970		 224.5435708
-0.75
239.0665751		 105.9118256
-2.69
337.9996425		 0″.51

 

Impact date: 2880 03 16.988 (UT)   Vimpact= 17.853 km/sec   Ψimpact = 2°.01  

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.


Oldest result (November 2008)


Number of original observations: 243
Arc : 1950 02 22 - 2008 11 08
Nominal rms: 0″.73 (486 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
 		 20081130

28800309		 1.698749666
-0.40
1.702704337		 0.507531546
0.42
0.513497830		 12.1820086
-0.55
11.1321243		 356.7825108
0.60
344.9712751		 224.5336250
-0.10
239.0664927		 161.0594362
-1.53
337.9996122		 0″.73

 

Impact date: 2880 03 16.989 (UT)   Vimpact= 17.848 km/sec   Ψimpact = 1°.92  

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)




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