Solar System Dynamics Group 2009 TM8

Asteroid 2009 TM8 was discovered on November 15, 2009 by the Catalina Sky Survey; two days later, on 17 October, it passed about 348000 kilometers from Earth (slightly closer than the orbit of the Moon). It has a diameter less than 10 meters.

#### Year: 2079a

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

20100104

20791011
1.587697600
-3.16
1.558565456
0.416479772
-3.16
0.407135708
2.1534920
-3.13
2.9558105
205.8388740
-3.13
204.2324875
218.7361904
3.15
221.5782891
22.8165340
3.16
339.3156076
1″.39

Impact date: 2079 10 18.561(UT)   Vimpact= 13.491 km/sec   Ψimpact = 49°.55

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: 2079b

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

20100104

20791011
1.587698390
-3.16
1.558163610
0.416480050
-3.16
0.407023745
2.1534929
-3.13
2.9641158
205.8388740
-3.13
204.2948533
218.7361762
3.15
221.6434462
22.8165239
3.16
339.2445911
1″.39

Impact date: 2079 10 18.669(UT)   Vimpact= 13.435 km/sec   Ψimpact = 13°.17

#### Year: 2081

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

20100104

20811011
1.587437755
-2.55
1.558212951
0.416378497
-2.55
0.408036611
2.1532372
-2.55
2.3352668
205.8386727
-2.49
204.3641864
218.7372160
2.55
222.0071745
22.8211051
2.55
339.3483311
1″.35

Impact date: 2081 10 18.199(UT)   Vimpact= 13.583 km/sec   Ψimpact = 69°.10

#### Year: 2085a

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

20100104

20851011
1.587412050
-2.49
1.560214977
0.416368466
-2.49
0.408744373
2.1532010
-2.46
2.3125202
205.8386709
-2.49
204.1614006
218.7372957
2.50
222.1359270
22.8215586
2.49
339.4125633
1″.34

Impact date: 2085 10 18.171(UT)   Vimpact= 13.794 km/sec   Ψimpact = 36°.63

#### Year: 2085b

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

20100104

20851011
1.587712732
-3.20
1.555841869
0.416485705
-3.19
0.406274673
2.1535215
-3.20
3.0310436
205.8388625
-3.09
204.1569656
218.7361705
3.16
221.7327789
22.8162623
3.19
339.4714688
1″.39

Impact date: 2085 10 18.036(UT)   Vimpact= 13.465 km/sec   Ψimpact = 27°.20