* Astronomy

Blobrana · L

RE: Asteroid 2011 QY39

Blobrana · L

2011 QY39 Apollo PHA

Discovered by 'astronomical observatory of San Marcello Pistoiese' - MPC 104 - as an Apollo PHA asteroid and provisionally named by the Minor Planet Centre as 2011 QY39.
This is 'the first time, in Italian territory, of the discovery of a "potentially dangerous" asteroid whose orbit intersects with the Earth, and is large enough to cause serious damage.
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Blobrana · L

Orbital elements:
2011 QY39                                           PHA, Earth MOID = 0.0071 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 317.51884              (2000.0)            P               Q
n   0.44210311     Peri.   81.30152     +0.18020947     -0.98362811
a   1.7065552      Node   358.31623     +0.89505091     +0.16420987
e   0.5097068      Incl.    1.05726     +0.40793188     +0.07423519
P   2.23           H   20.2           G   0.15           U   9

MPEC 2011 - R13

The 250 - 560 metre wide asteroid 2011 QY39 will make a close pass (31.4 lunar distances, 0.0806 AU), travelling at 9.56 km/second, to the Earth-Moon system on the 28th October, 2011 @ 09:49 UT ±2 days 13:42.

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