Solar System
Dynamics
Group 		(101955) 1999 RQ36
older results

1999 RQ36 was discovered on September 11th 1999 by LINEAR Survey (New Mexico). It has a diameter of about 200 meters.

Number of original observations: 290
Arc : 1999 09 11 - 2006 05 26
Nominal rms: 0″.41 (561 residuals)

Possible collisions in: 2168, 2171, 2178, 2185





Year: 2168


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
 		 20060704

21680917		 1.126371182
0.36
1.070488710		 0.203801476
0.28
0.164124616		 6.0351637
-0.43
8.1526496		 2.0839373
-0.06
359.6661607		 66.1895944
0.28
76.6542332		 187.8577956
-0.33
294.4370377		 0″.41

 

Impact date: 2168 09 24.336 (UT)   Vimpact= 12.518 km/sec   Ψimpact = 67°.25  

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: 2171


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
 		 20060704

21710918		 1.126371183
-0.48
1.112141846		 0.203801498
-1.04
0.197901555		 6.0351673
-1.46
6.2792362		 2.0839351
0.35
359.7472286		 66.1896011
-0.78
70.9487224		 187.8577941
0.34
303.2428520		 0″.41

 

Impact date: 2171 09 25.207 (UT)   Vimpact= 12.595 km/sec   Ψimpact =49°.48  

Year: 2178


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
 		 20060704

21780917		 1.126371183
-0.48
1.111292911		 0.203801500
-1.16
0.197571351		 6.0351638
-0.46
6.2848761		 2.0839353
0.31
359.6499273		 66.1895986
-0.39
71.1148527		 187.8577962
-0.60
302.4882031		 0″.41

 

Impact date: 2178 09 24.872 (UT)   Vimpact= 12.731 km/sec   Ψimpact =23°.96  

Year: 2185


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

/tr>
Epoch [TT] a [AU] e i [deg] Ω [deg] ω [deg] M [deg] rms
 
dev/σ
 		 20060704

21850917		 1.126371185
-2.14
1.095101294		 0.203801481
-0.02
0.192803786		 6.0351666
-1.26
6.3814724		 2.0839360
0.19
359.5787867		 66.1895993
-0.50
74.8167114		 187.8577938
0.47
298.9788259		 0″.41

 

Impact date: 2185 09 24.580 (UT)   Vimpact= 12.626 km/sec   Ψimpact =22°.38  



External links:

1999 RQ36 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
1999 RQ36 page and Impact Risk page at the NEO Dynamic Site (NEODyS)




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