Solar System
Dynamics
Group 		2008 ER7
older results

Asteroid 2008 ER7 was discovered on March 6, 2008 by the SPACEWATCH project at Kitt Peak.
It has a diameter of about 300—670 meters.

Number of original observations: 90
Arc : 2008 03 06 - 2008 04 24
Nominal rms: 0″.34 (179 residuals)

Possible collisions in: 2077, 2095, 2102A, 2102B





Year: 2077


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
 		 20080514

20770204		 1.487463250
-5.68
1.498093313		 0.624271389
-5.58
0.625704035		 2.2469958
-5.37
2.2664801		 323.8132488
-4.90
321.7754697		 80.6088496
4.96
83.1761604		 95.9283811
5.68
23.0660903		 0″.37

 

Impact date: 2077 02 11.127 (UT)   Vimpact= 21.875 km/sec   Ψimpact = 31°.82  

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: 2095


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
 		 20080514

20950204		 1.487602222
>100
1.487877310		 0.624360321
>100
0.624724845		 2.2473425
>100
2.2363581		 323.8167037
>100
321.7947598		 80.6038490
>100
82.6957849		 95.9126935
>100
23.0450020		 0″.40

 

Impact date: 2095 02 11.709 (UT)   Vimpact= 21.794 km/sec   Ψimpact = 41°.72  

Year: 2102


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
 		 20080514

21020204		 1.486810963
>100
1.482486395		 0.623861096
>100
0.623437078		 2.2454428
>100
2.1872641		 323.7977374
>100
321.8140569		 80.6306693
>100
82.7204346		 96.0024414
>100
22.6988689		 0″.38

 

Impact date: 2102 02 12.647 (UT)   Vimpact= 22.059 km/sec   Ψimpact = 59°.43  

 
dev/σ
 		 20080514

21020204		 1.486866686
>100
1.482536465		 0.623898265
>100
0.623483227		 2.2456136
>100
2.1824299		 323.7996930
>100
321.9208418		 80.6279353
>100
82.6085419		 95.9961727
>100
22.6972880		 0″.37

 

Impact date: 2102 02 12.645 (UT)   Vimpact= 21.719 km/sec   Ψimpact = 35°.09  




External links:


2008 ER7 page (NASA JPL) and Impact Risk page NEO Program (NASA JPL)
2008 ER7 page and Impact Risk page at the NEO Dynamic Site (NEODyS)




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