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Post Info TOPIC: Asteroid 2009 HL21
Blobrana


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Asteroid 2009 HL21
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2009 HL21
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -6.50
Palermo Scale (cumulative) -5.58
Impact Probability (cumulative) 1.5e-07
Number of Potential Impacts 103
Vimpact 13.73 km/s
Vinfinity 8.02 km/s
H 22.4
Diameter 0.110 km
Mass 1.9e+09 kg
Energy 4.2e+01 MT
all above are mean values
weighted by impact probability
Analysis based on
33 observations spanning .99878 days
(2009-Apr-20.92262 to 2009-Apr-21.9214)

Source

-- Edited by Blobrana on Wednesday 22nd of April 2009 11:16:10 AM

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Blobrana


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Orbital elements:
2009 HL21                                                Earth MOID = 0.0107 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M  47.76659              (2000.0)            P               Q
n   0.45241772     Peri.    2.50534     -0.88806953     -0.45961646
a   1.6805173      Node   150.12678     +0.42145199     -0.82201989
e   0.4546862      Incl.    1.06195     +0.18360480     -0.33620828
P   2.18           H   22.4           G   0.15           U   8

MPEC 2009 - H35

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