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Post Info TOPIC: Asteroid 2009 XR1


L

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RE: Asteroid 2009 XR1
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Asteroid 2009 XR1 has passed the Earth.

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L

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The 3.5 - 8.5 metre wide asteroid 2009 XR1 will made a close pass (2.0 lunar distances, 0.0050 AU), travelling at 6.43 km/second, to the Earth-Moon system on the 15th December, 2009.

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


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2009 XR1
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -9.50
Palermo Scale (cumulative) -8.88
Impact Probability (cumulative) 1.2e-07
Number of Potential Impacts 6
Vimpact 12.67 km/s
Vinfinity 6.03 km/s
H 29.3
Diameter 0.005 km
Mass 1.4e+05 kg
Energy 2.7e-03 MT
all above are mean values
weighted by impact probability
Analysis based on
15 observations spanning .22732 days
(2009-Dec-11.14638 to 2009-Dec-11.3737)



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Orbital elements:
2009 XR1 Earth MOID = 0.0010 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC
M 359.92394 (2000.0) P Q
n 0.45573110 Peri. 210.41020 -0.30686481 -0.95172300
a 1.6723619 Node 257.46108 +0.87477073 -0.27890090
e 0.4250678 Incl. 0.44442 +0.37498020 -0.12820931
P 2.16 H 29.2 G 0.15 U 7

MPEC 2009 - X36


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