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Post Info TOPIC: Asteroid 2009 HM73
Blobrana


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RE: Asteroid 2009 HM73
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The 65 - 150 metre wide asteroid 2009 HM73 will make a close pass (68.8 Lunar Distances, 0.1768 AU), travelling at 5.69 km/s, to the Earth-Moon system on the 21st May, 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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Blobrana


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Impactor Table
Date MJD Sigma Sigmaimp dist ± width stretch p_RE exp. en PS TS
yr-mo-day (RE) (RE/sigma) (MT)
2086-05-18.677 83093.677 2.388 0.361 193.03 ± 530.386 2.73e+6 4.30e-11 8.93e-10 -9.68 0

Based on 20 optical observations (of which 0 are rejected as outliers) from 2009-04-28.375 to 2009-04-30.216.

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Blobrana


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2009 HM73
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -7.24
Palermo Scale (cumulative) -6.95
Impact Probability (cumulative) 9.4e-09
Number of Potential Impacts 12
Vimpact 14.63 km/s
Vinfinity 9.47 km/s
H 23.0
Diameter 0.087 km
Mass 8.9e+08 kg
Energy 2.3e+01 MT
all above are mean values
weighted by impact probability
Analysis based on
13 observations spanning .93255 days
(2009-Apr-28.37383 to 2009-Apr-29.30638)

Source

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Blobrana


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Orbital elements:
2009 HM73                                                Earth MOID = 0.1727 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  10.08078              (2000.0)            P               Q
n   0.29418973     Peri.  156.65174     -0.62048847     +0.77776020
a   2.2389843      Node    74.84463     -0.73490908     -0.53200318
e   0.4735229      Incl.    5.97146     -0.27368359     -0.33475615
P   3.35           H   23.1           G   0.15           U   9

MPEC 2009 - H80

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