Solar System
Dynamics
Group 		(101955) 1999 RQ36

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

Older results based on shorter arcs

Number of original observations: 293
Arc : 1999 09 11 - 2006 05 26
Nominal rms: 0″.41 (568 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
0.66
1.070487369		 0.203801476
0.60
0.164124649		 6.0351637
0.06
8.1526543		 2.0839373
-0.19
359.6661380		 66.1895944
0.56
76.6549418		 187.8577956
-0.51
294.4395184		 0″.41

 

Impact date: 2168 09 24.323 (UT)   Vimpact= 12.735 km/sec   Ψimpact = 20°.09  

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

21710917		 1.126371183
-0.20
1.112098728		 0.203801498
-0.67
0.197837431		 6.0351673
-0.95
6.2770805		 2.0839351
0.21
359.7498866		 66.1896011
-0.46
70.9461341		 187.8577941
0.14
302.3955794		 0″.41

 

Impact date: 2171 09 25.207 (UT)   Vimpact= 12.569 km/sec   Ψimpact =49°.54  

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
-0.20
1.111293039		 0.203801500
-0.79
0.197571361		 6.0351638
0.03
6.2848753		 2.0839353
0.18
359.6499280		 66.1895986
-0.08
71.1148222		 187.8577962
-0.77
302.4879206		 0″.41

 

Impact date: 2178 09 24.873 (UT)   Vimpact= 12.684 km/sec   Ψimpact =23°.90  

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
-1.92
1.095100942		 0.203801481
0.31
0.192803828		 6.0351666
-0.76
6.3814740		 2.0839360
0.05
359.5787872		 66.1895993
-0.19
74.8168274		 187.8577938
0.27
298.9802098		 0″.41

 

Impact date: 2185 09 24.576 (UT)   Vimpact= 12.813 km/sec   Ψimpact =9°.88  



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