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Post Info TOPIC: Asteroid 2008 KC3
Blobrana


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RE: Asteroid 2008 KC3
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Observations of the Asteroid  by the Goldstone and Arecibo radio telescopes have been scheduled for 22-27th  and 25-29th August respectively.

Almost nothing is known about its physical properties, but its absolute magnitude of 17.9 suggests a diameter of roughly 800 meters if it has an albedo representative of the most common compositional class of asteroids.
This object has an unusual orbit suggesting that it may be an inactive comet nucleus.  Its semimajor axis (3.2 AU) is deep in the outer asteroid belt, where most objects tend to be optically dark, and its aphelion distance is beyond the orbit of Jupiter.  If this object has a dark optical albedo, then its diameter may be much larger than 800 meters, possibly as much as 1500 meters, and thus a significantly stronger radar target than our signal-to-noise estimates below suggest.
Furthermore, only a few inactive comet candidates have been observed by radar, so this is an important opportunity.  Recent research has shown that some outer main-belt asteroids intermittently show cometary activity (such as the formation of a coma) and may represent a class of objects transitional between asteroids and comets.
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Blobrana


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2009 KC3
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -3.34
Palermo Scale (cumulative) -3.18
Impact Probability (cumulative) 1.7e-07
Number of Potential Impacts 3
Vimpact 16.50 km/s
Vinfinity 12.17 km/s
H 17.9
Diameter 0.890 km
Mass 9.7e+11 kg
Energy 3.1e+04 MT
all above are mean values
weighted by impact probability
Analysis based on
30 observations spanning 21.166 days
(2009-May-04.59432 to 2009-May-25.76019)



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Blobrana


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The 720 - 1600 metre wide asteroid 2009 KC3 will make a close pass (18.8 Lunar Distances, 0.0484 AU), travelling at 11.80 km/s, to the Earth-Moon system on the 24th August, 2009.

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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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Ephemeris

Date__(UT)__HR:MN     R.A._(ICRF/J2000.0)_DEC  APmag          

 2009-May-25 00:00     13 52 33.84 -42 37 23.3  18.33 
 2009-Jun-09 00:00     13 13 49.50 -43 00 21.7  18.13 
 2009-Jun-24 00:00     12 42 57.69 -42 26 08.6  17.97 
 2009-Jul-09 00:00     12 22 13.33 -42 02 56.9  17.78 
 2009-Jul-24 00:00     12 02 28.26 -42 17 33.6  17.55 
 2009-Aug-08 00:00     11 13 32.34 -41 33 36.9  17.34
 2009-Aug-23 00:00     07 47 34.10 -12 26 38.8   n.a. 
 2009-Sep-07 00:00     03 51 30.30 +37 58 05.2  15.55
 2009-Sep-22 00:00     02 35 45.01 +43 16 49.0  16.33


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Blobrana


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2009 KC3
Earth Impact Risk Summary
Torino Scale (maximum) 0
Palermo Scale (maximum) -2.72
Palermo Scale (cumulative) -2.56
Impact Probability (cumulative) 6.7e-07
Number of Potential Impacts 10
Vimpact 16.49 km/s
Vinfinity 12.16 km/s
H 17.9
Diameter 0.910 km
Mass 1.0e+12 kg
Energy 3.3e+04 MT
all above are mean values
weighted by impact probability
Analysis based on
19 observations spanning 19.903 days
(2009-May-04.59432 to 2009-May-24.49722)

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Blobrana


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Orbital elements:
2009 KC3                                            PHA, Earth MOID = 0.0098 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 350.32405              (2000.0)            P               Q
n   0.17306486     Peri.  337.45864     +0.73778502     +0.67240712
a   3.1890656      Node   339.91563     -0.58989912     +0.59936306
e   0.6977259      Incl.    9.98013     -0.32816505     +0.43431854
P   5.70           H   17.9           G   0.15           U   7

MPEC 2009 - K39

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