* Astronomy

Blobrana · L

RE: Asteroid 2009 RR

Blobrana · L

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     Mag
2014 09 13    00 59 14.2 +27 26 11   0.02100 1.0227   140.9    38.3    18.7
2014 09 14    02 13 11.3 +33 41 31   0.01546 1.0152   125.8    53.4    18.4
2014 09 15    04 38 12.4 +36 48 50   0.01247 1.0077    98.4    80.9    18.8
2014 09 16    07 11 56.8 +27 28 17   0.01379 1.0002    67.0   112.3    20.5
2014 09 17    08 33 48.4 +16 27 12   0.01852 0.9928    47.2   132.0    22.7
2014 09 18    09 14 12.6 +09 35 14   0.02479 0.9854    37.2   141.9    24.6
2014 09 19    09 36 57.5 +05 26 52   0.03170 0.9780    32.0   147.0    25.8
2014 09 20    09 51 19.7 +02 46 59   0.03892 0.9707    29.2   149.7    26.8

Blobrana · L

2009 RR
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-6.24
Palermo Scale (cumulative)	-5.64
Impact Probability (cumulative)	7.6e-06
Number of Potential Impacts	13

V_impact	17.09 km/s
V_infinity	12.96 km/s
H	25.6
Diameter	0.026 km
Mass	2.4e+07 kg
Energy	8.5e-01 MT
all above are mean values weighted by impact probability

Analysis based on
35 observations spanning 3.8834 days
(2009-Sep-11.18242 to 2009-Sep-15.065792)

Blobrana · L

2009 RR
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-6.83
Palermo Scale (cumulative)	-6.08
Impact Probability (cumulative)	2.5e-06
Number of Potential Impacts	11

V_impact	17.12 km/s
V_infinity	13.00 km/s
H	25.5
Diameter	0.027 km
Mass	2.6e+07 kg
Energy	9.2e-01 MT
all above are mean values weighted by impact probability

Analysis based on
20 observations spanning 1.8608 days
(2009-Sep-11.18242 to 2009-Sep-13.04322)

Blobrana · L

2009 RR
Earth Impact Risk Summary

Torino Scale (maximum)	0
Palermo Scale (maximum)	-6.37
Palermo Scale (cumulative)	-5.37
Impact Probability (cumulative)	9.7e-06
Number of Potential Impacts	121

V_impact	17.91 km/s
V_infinity	14.01 km/s
H	25.5
Diameter	0.027 km
Mass	2.7e+07 kg
Energy	1.1e+00 MT
all above are mean values weighted by impact probability

Analysis based on
14 observations spanning .15456 days
(2009-Sep-11.18242 to 2009-Sep-11.33698)

Blobrana · L

Orbital elements:
2009 RR                                                  Earth MOID = 0.0029 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 265.68990              (2000.0)            P               Q
n   0.64890062     Peri.  257.86028     +0.29779819     -0.95458883
a   1.3213481      Node   174.78957     +0.90901972     +0.28076208
e   0.4245200      Incl.    5.52332     +0.29154654     +0.09966354
P   1.52           H   25.6           G   0.15           U   8

MPEC 2009 - R39

The 21 - 47 metre wide asteroid 2009 RR will make a close pass (2.9 Lunar Distances, 0.0074 AU), travelling at 12.48 km/s, to the Earth-Moon system on the 16th September, 2009.

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