Solar System
Dynamics
Group
2008 ST7
older results

The small asteroid 2008 ST7 was discovered on September 24, 2008 by the Mount Lemmon Survey, seventeen days after it had passed within 880 000 km of Earth.
It has a diameter of about 50 meters.

Number of original observations: 108
Arc : 2008 09 24 - 2008 10 20
Nominal rms: 0″.32 (205 residuals)

Possible collisions in: 2074, 2082, 2089, 2094A, 2094B, 2094C





Year: 2074


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

20740903
1.934926113
-3.32
1.883457113
0.514292260
-3.28
0.503099773
2.4511716
-3.22
3.0436767
347.8877863
4.88
346.7031571
321.6181827
-0.28
322.0399603
40.8997481
3.30
8.7128886
0″.33

 

Impact date: 2074 09 10.012 (UT)   Vimpact= 15.079 km/sec   Ψimpact = 32°.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: 2082


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

20820902
1.930699091
2.39
1.870293912
0.513182514
2.37
0.499912693
2.4474458
2.35
2.7409396
347.8936609
-2.93
346.4405649
321.6181887
-0.29
321.8332101
41.0361023
-2.38
8.5694379
0″.33

 

Impact date: 2082 09 09.848 (UT)   Vimpact= 15.263 km/sec   Ψimpact = 17°.14  

Year: 2089


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

20890902
1.935111264
-3.57
1.942666656
0.514328619
-3.47
0.515678856
2.4512472
-3.33
2.4578864
347.8837118
10.31
346.3700944
321.6227266
-4.75
323.8494646
40.8943448
3.53
7.6080341
0″.39

 

Impact date: 2089 09 09.643 (UT)   Vimpact= 15.162 km/sec   Ψimpact = 77°.48  

Year: 2094


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

20940903
1.933010369
-0.73
1.925067610
0.513790277
-0.73
0.512071012
2.4494712
-0.68
2.4698775
347.8903891
1.42
346.4479114
321.6182109
-0.31
323.2935874
40.9614407
0.73
8.1087116
0″.32

 

Impact date:2094 09 09.992 (UT)   Vimpact= 15.268 km/sec   Ψimpact = 55°.31  

 
dev/σ
 
20081130

20940903
1.934333348
-2.52
1.925112946
0.514139095
-2.50
0.512154878
2.4506673
-2.47
2.4700094
347.8892982
2.87
346.5453794
321.6173648
0.52
323.2349883
40.9187258
2.51
8.0890246
0″.32

 

Impact date: 2094 09 10.064 (UT)   Vimpact= 15.306 km/sec   Ψimpact = 30°.80  

 
dev/σ
 
20081130

20940903
1.938481690
-8.12
1.992600885
0.515238017
-8.10
0.525874286
2.4544010
-8.05
2.7502770
347.8879445
4.67
346.3776885
321.6121274
5.67
325.1440416
40.7849021
8.09
7.2173048
0″.36

 

Impact date: 2094 09 9.903 (UT)   Vimpact= 15.307 km/sec   Ψimpact = 48°.43  




External links:

2008 ST7 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
2008 ST7 page and Impact Risk page at the NEO Dynamic Site (NEODyS)




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