* Astronomy

Blobrana · L

RE: Asteroid 2009 KN4

Blobrana · L

2009 KN4
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.64
Palermo Scale (cumulative)	-3.36
Impact Probability (cumulative)	3.4e-07
Number of Potential Impacts	14

V_impact	15.88 km/s
V_infinity	11.32 km/s
H	18.1
Diameter	0.807 km
Mass	7.2e+11 kg
Energy	2.2e+04 MT
all above are mean values weighted by impact probability

Analysis based on
20 observations spanning 4.6815 days
(2009-May-23.78358 to 2009-May-28.46513)

Orbit diagram and elements available here.

Blobrana · L

2009 KN4
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.84
Palermo Scale (cumulative)	-3.05
Impact Probability (cumulative)	5.8e-07
Number of Potential Impacts	66

V_impact	15.83 km/s
V_infinity	11.24 km/s
H	18.1
Diameter	0.796 km
Mass	6.9e+11 kg
Energy	2.1e+04 MT
all above are mean values weighted by impact probability

Analysis based on
16 observations spanning 3.0961 days
(2009-May-23.78358 to 2009-May-26.87971)

Blobrana · L

2009 KN4
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-3.01
Palermo Scale (cumulative)	-2.72
Impact Probability (cumulative)	6.0e-07
Number of Potential Impacts	100

V_impact	15.90 km/s
V_infinity	11.34 km/s
H	18.0
Diameter	0.853 km
Mass	8.5e+11 kg
Energy	2.6e+04 MT
all above are mean values weighted by impact probability

Analysis based on
12 observations spanning 2.6603 days
(2009-May-23.78358 to 2009-May-26.44385)

Source

Blobrana · L

Orbital elements:
2009 KN4                                            PHA, Earth MOID = 0.0111 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 340.31434              (2000.0)            P               Q
n   0.33582755     Peri.   35.88902     +0.96126279     +0.24600148
a   2.0498646      Node   309.38740     -0.27513892     +0.82937243
e   0.5466027      Incl.    9.25699     -0.01650533     +0.50162202
P   2.93           H   18.0           G   0.15           U   8

MPEC 2009 - K46