1994 WR12

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1994 WR12
Discovery[1]
Discovered by Carolyn S. Shoemaker
Palomar Observatory (675)
Discovery date 28 November 1994
Designations
MPC designation 1994 WR12
MPO 57659
Aten Aten
NEO, PHA
Orbital characteristics[2]
Epoch 27 December 1994 (JD 2449713.5)
Uncertainty parameter 8
Aphelion 1.0576 AU (158.21 Gm) (Q)
Perihelion 0.45616 AU (68.241 Gm) (q)
0.75686 AU (113.225 Gm) (a)
Eccentricity 0.39730 (e)
0.66 yr (240.5 d)
174.83° (M)
1.4969°/day (n)
Inclination 6.8639° (i)
63.068° (Ω)
205.68° (ω)
Earth MOID 0.00235897 AU (352,897 km)
Jupiter MOID 4.02184 AU (601.659 Gm)
Physical characteristics
Dimensions ~130 meters[3]
Mass 2.9×109 kg (assumed)[3]
22.0[2]

1994 WR12 (also written 1994 WR12) is a near-Earth asteroid[2] with a poorly known orbit.[2] It was first imaged on 26 November 1994,[2] and was discovered on 28 November 1994 by Carolyn S. Shoemaker at Palomar Observatory (675).[1] It has a diameter of about 130 meters,[3] and is listed on the Sentry Risk Table.[4] The next good chance to observe the asteroid may not be until November 2044 when the orbital uncertainty will allow it to pass somewhere between 0.03–0.19 au from Earth.[5]

Virtual clones of the asteroid that fit the uncertainty in the known trajectory show 125 potential impacts between 2054 and 2113.[3] It has about a cumulative 1 in 10000 chance of impacting the Earth.[3] The poorly known trajectory of this asteroid (uncertainty=8) is further complicated by close approaches to Venus and Mercury.[5]

It is estimated that an impact would produce the equivalent of 77 megatons of TNT,[3] roughly 1.5 times that of most powerful nuclear weapon ever detonated (Tsar Bomba).

See also[edit]

References[edit]

  1. ^ a b "MPEC 1994-Y05 : 1994 WR12". IAU Minor Planet Center. 1994-12-21. Retrieved 2011-10-17. 
  2. ^ a b c d e "JPL Small-Body Database Browser: (1994 WR12)" (last observation: 1994-12-31; arc: 35 days; Uncertainty: 8). Jet Propulsion Laboratory. Retrieved 29 March 2016. 
  3. ^ a b c d e f "Earth Impact Risk Summary: 1994 WR12". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-07-08. 
  4. ^ "Sentry Risk Table". NASA/JPL Near-Earth Object Program Office. 14 Oct 2011. Archived from the original on 2013-05-29. Retrieved 2011-10-17. 
  5. ^ a b "JPL Close-Approach Data: (1994 WR12)" (last observation: 1994-12-31; arc: 35 days; Uncertainty: 8). Retrieved 2011-04-07. 

External links[edit]