* Astronomy

Blobrana · L

RE: Asteroid 2009 WJ6

Blobrana · L

Asteroid 2009 WJ6 has just passed the Earth.

Blobrana · L

Ephemris

 Date__(UT)__HR:MN     R.A._(ICRF/J2000.0)_DEC  Mag
 2009-Nov-18 00:00     03 25 54.76 +29 29 06.7  20.24 
 2009-Nov-19 00:00     03 27 11.94 +31 16 10.8  19.16 
 2009-Nov-20 00:00     03 34 52.34 +40 28 23.8  17.00
 2009-Nov-21 00:00     15 17 06.90 -15 48 15.3   n.a. 
 2009-Nov-22 00:00     15 21 49.09 -23 27 41.6   n.a. 
 2009-Nov-23 00:00     15 22 54.13 -25 06 27.0   n.a.

Blobrana · L

2009 WJ6
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-5.21
Palermo Scale (cumulative)	-4.98
Impact Probability (cumulative)	7.8e-05
Number of Potential Impacts	4

V_impact	21.30 km/s
V_infinity	18.16 km/s
H	27.5
Diameter	0.011 km
Mass	1.7e+06 kg
Energy	9.3e-02 MT
all above are mean values weighted by impact probability

Analysis based on
28 observations spanning .30011 days
(2009-Nov-19.26657 to 2009-Nov-19.56668)

Blobrana · L

Orbital elements:
2009 WJ6                                                 Earth MOID = 0.0010 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M 358.85528              (2000.0)            P               Q
n   0.41973440     Peri.  262.91045     -0.78215201     -0.61853271
a   1.7666601      Node   238.85069     +0.60073219     -0.71653716
e   0.6335430      Incl.    5.04123     +0.16540579     -0.32247757
P   2.35           H   27.5           G   0.15           U   6

MPEC 2009 - W33

The 8 - 19 metre wide asteroid 2009 WJ6 will make a close pass (0.5 Lunar Distances, 0.0012 AU), travelling at 18.22 km/s, to the Earth-Moon system on the 20th November, 2009.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).