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2014 AA
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2014 AA was a small Apollo near-Earth asteroid roughly 2–4 meters in diameter that struck Earth on 2 January 2014.[1] It was discovered on 1 January 2014 by Richard Kowalski at the Mount Lemmon Survey at an apparent magnitude of 19 using a 1.52-meter (60 in) reflecting telescope at Mount Lemmon Observatory.[1] 2014 AA was only observed over a short observation arc of about 70 minutes,[1] and entered Earth's atmosphere about 21 hours after discovery.[3] Nonetheless, it remains one of only a few asteroids observed before impact (see Asteroid impact prediction).[4]
Quick Facts Discovery, Discovered by ...
![]() 2014 AA imaged by the Catalina Sky Survey in January 2014. The asteroid was around one lunar distance from Earth at that time. | |
Discovery[1] | |
---|---|
Discovered by | Richard Kowalski Mount Lemmon Survey (G96) |
Discovery date | 1 January 2014 |
Designations | |
2014 AA | |
Orbital characteristics[2] | |
Epoch 1 January 2014 (JD 2456658.5) | |
Uncertainty parameter 9 | |
Observation arc | ~70 minutes[1] |
Aphelion | 1.4080 AU (210.63 Gm) (Q) |
Perihelion | 0.9163 AU (137.08 Gm) (q) |
1.1623 AU (173.88 Gm) (a) | |
Eccentricity | 0.2116 (e) |
1.25 yr (457.26 d) | |
324.1460° (M) | |
0° 47m 14.244s / day (n) | |
Inclination | 1.4156° (i) |
101.6086° (Ω) | |
15 February 2014 (would have been) | |
52.3393° (ω) | |
Earth MOID | 4.54412×10−7 AU (67.9791 km) |
Jupiter MOID | 3.58092 AU (535.698 Gm) |
Physical characteristics | |
Dimensions | ~3 meters (10 ft) |
Mass | ~4×104 kg (assumed) |
30.9[2] | |
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