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Post Info TOPIC: Asteroid 2011 BT15
Blobrana


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RE: Asteroid 2011 BT15
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The 120 - 270 metre wide asteroid 2011 BT15 will make a close pass (12.5 lunar distances, 0.0322 AU), travelling at 6.00 km/second, to the Earth-Moon system on the 28th December 2013 @ 15:33 UT ±00:01. 

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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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Orbital elements:
2011 BT15                                           PHA, Earth MOID = 0.0009 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 213.54426              (2000.0)            P               Q
n   0.66757735     Peri.  308.46479     +0.58313700     -0.81189580
a   1.2965870      Node   105.84143     +0.75406918     +0.52820627
e   0.3036993      Incl.    1.65979     +0.30221005     +0.24864299
P   1.48           H   21.8           G   0.15           U   3

MPEC 2013 - M09

Key to Orbital elements



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Blobrana


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2011 BT15
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -3.34
Palermo Scale (cumulative) -2.90
Impact Probability (cumulative) 7.6e-05
Number of Potential Impacts 88
Vimpact 13.11 km/s
Vinfinity 6.90 km/s
H 21.7
Diameter 0.150 km
Mass 4.9e+09 kg
Energy 1.0e+02 MT
all above are mean values
weighted by impact probability
Analysis based on
69 observations spanning 40.917 days
(2011-Jan-24.28933 to 2011-Mar-06.20673)



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Blobrana


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Posts: 131433
Date:
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2011 BT15
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -3.48
Palermo Scale (cumulative) -2.81
Impact Probability (cumulative) 9.1e-05
Number of Potential Impacts 120
Vimpact 13.11 km/s
Vinfinity 6.91 km/s
H 21.8
Diameter 0.150 km
Mass 4.7e+09 kg
Energy 9.6e+01 MT
all above are mean values
weighted by impact probability
Analysis based on
57 observations spanning 35.972 days
(2011-Jan-24.28933 to 2011-Mar-01.26104)



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Blobrana


L

Posts: 131433
Date:
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Orbital elements:
2011 BT15                                           PHA, Earth MOID = 0.0013 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5                  MPC
M  36.48821              (2000.0)            P               Q
n   0.63120667     Peri.  309.74665     +0.57676209     -0.81638539
a   1.3459275      Node   105.00619     +0.75848382     +0.52182954
e   0.3283427      Incl.    1.74022     +0.30339377     +0.24740417
P   1.56           H   21.9           G   0.15           U   9

MPEC 2011 - B43

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