* Astronomy

Blobrana · L

RE: Asteroid 2009 YR

Blobrana · L

Asteroid 2009 YR has passed the Earth.

Blobrana · L

2009 YR
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-7.15
Palermo Scale (cumulative)	-6.89
Impact Probability (cumulative)	6.8e-06
Number of Potential Impacts	6

V_impact	11.57 km/s
V_infinity	3.12 km/s
H	28.0
Diameter	0.008 km
Mass	8.2e+05 kg
Energy	1.3e-02 MT
all above are mean values weighted by impact probability

Analysis based on
26 observations spanning 3.6068 days
(2009-Dec-19.27429 to 2009-Dec-22.88105)

Blobrana · L

The 7 - 15 metre wide asteroid 2009 YR will make a close pass (4.3 lunar distances, 0.0112 AU), travelling at 2.85 km/second, to the Earth-Moon system on the 25th 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).

Blobrana · L

Orbital elements:
2009 YR                                                  Earth MOID = 0.0019 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M 258.98706              (2000.0)            P               Q
n   1.07999994     Peri.  128.30008     -0.81252280     +0.58279658
a   0.9408497      Node    87.35079     -0.53864070     -0.74245779
e   0.1116417      Incl.    0.71375     -0.22287415     -0.33030982
P   0.91           H   28.0           G   0.15           U   8

MPEC 2009 - Y30

2009 YR
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-7.62
Palermo Scale (cumulative)	-7.43
Impact Probability (cumulative)	2.0e-06
Number of Potential Impacts	43

V_impact	11.57 km/s
V_infinity	3.11 km/s
H	28.0
Diameter	0.008 km
Mass	8.2e+05 kg
Energy	1.3e-02 MT
all above are mean values weighted by impact probability

Analysis based on
16 observations spanning .63289 days
(2009-Dec-19.27429 to 2009-Dec-19.90718)