* Astronomy

Blobrana · L

RE: Asteroid 2012 QG42

Blobrana · L

Close asteroid encounter tonight exposes potential hazard

This relatively large 625 feet to 1,400 feet wide body will zip by no closer than about 7.5 times the distance to the moon (1.8 million miles). Officially, it has been designated a "potentially hazardous asteroid" (PHA) by the Minor Planet Centre, applied to any asteroid (or comet) which may pose a threat (though this one does not).
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Blobrana · L

Google earth file: Asteroid 2012 QG42.kmz (17kb, kmz)

Blobrana · L

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2012 09 10    22 24.49   -00 55.1    0.0330   1.039   167.0    12.6    14.2
2012 09 11    21 56.62   +02 05.4    0.0281   1.033   158.7    20.7    14.1
2012 09 12    21 17.60   +06 13.0    0.0238   1.027   147.4    31.9    14.1
2012 09 13    20 23.27   +11 32.1    0.0206   1.020   132.3    46.8    14.2
2012 09 14    19 12.72   +17 13.1    0.0191   1.014   113.7    65.3    14.5
2012 09 15    17 54.98   +21 25.6    0.0197   1.007    94.2    84.7    15.3
2012 09 16    16 45.64   +23 11.7    0.0222   1.001    77.5   101.3    16.2
2012 09 17    15 52.72   +23 15.7    0.0260   0.994    64.7   113.9    17.3
2012 09 18    15 14.72   +22 37.3    0.0307   0.988    55.4   123.1    18.3
2012 09 19    14 47.45   +21 48.6    0.0359   0.981    48.5   129.9    19.2
2012 09 20    14 27.39   +21 01.3    0.0414   0.975    43.2   135.1    20.1

Blobrana · L

An asteroid passes close to Earth during the night between Thursday and Friday.

Vasteras Astronomers get the chance to photograph the celestial body with the large telescope of Akestaobservatoriet outside Västerås. The asteroid, with the scientific name 2012 QG42, is only a few hundred meters in diameter, but passing only about 270,000 mil above the ground.
Read more (Swedish)

Blobrana · L

The 230 - 520 metre wide asteroid 2012 QG42 will make a close pass (7.4 lunar distances, 0.0191 AU), travelling at 11.04 km/second, to the Earth-Moon system on the 14th September, 2012 @ 05:10 UT ±00:12.

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

Blobrana · L

Orbital elements:
2012 QG42                                           PHA, Earth MOID = 0.0137 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5                MPC
M 308.63651              (2000.0)            P               Q
n   0.94803187     Peri.  116.11577     -0.19301091     -0.98070755
a   1.0262522      Node   344.91579     +0.85236094     -0.15194632
e   0.3761938      Incl.    6.83603     +0.48603252     -0.12298384
P   1.04           H   20.3           G   0.15           U   8

MPEC 2012 - Q72