2011 CQ1

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2011 CQ1
Discovery[1]
Discovered by Catalina Sky Survey
Richard A. Kowalski
Discovery date February 4, 2011
Designations
MPC designation 2011 CQ1
Minor planet category Aten NEO[2]
Orbital characteristics[2]
Epoch 2011-Feb-08
(Uncertainty=5)[2]
Aphelion 1.009 AU (Q)
Perihelion 0.6624 AU (q)
0.8360 AU (a)
Eccentricity 0.2076
279.2 days
220.6° (M)
Inclination 5.296°
315.4°
335.1°
Physical characteristics
Dimensions ~1 meter (39 in)
14.2 (2011 peak)[3]
32[2]

2011 CQ1 is a meteoroid discovered on February 4, 2011 by Richard A. Kowalski, at the Catalina Sky Survey.[1] On the same day the meteoroid passed within 0.85 Earth radii (5,480 kilometers (3,410 mi)) of Earth's surface, and was perturbed from the Apollo class to the Aten class of near-Earth objects.[4] With a relative velocity of only 9.7 km/s,[2] had the asteroid passed less than 0.5 Earth radii from Earth's surface, it would have fallen as a brilliant fireball. The meteoroid is about 1 meter (39 in) wide.[4] The meteoroid was removed from the Sentry Risk Table on February 5, 2011.[5]

Parameter Epoch aphelion
(Q)
perihelion
(q)
Semi-major
axis

(a)
eccentricity
(e)
Period
(p)
inclination
(i)
Longitude
ascending
node

(Ω)
Mean
anomaly

(M)
Argument
of
perihelion

(ω)
Units AU (days) (°)
Pre-flyby 2011-Jan-26 1.347 0.9096 1.128 0.1940 437.9 1.073° 135.4° 310.9° 58.59°
Post-flyby 2011-Feb-08 1.009 0.6624 0.8360 0.2076 279.2 5.296° 315.4° 220.6° 335.1°

References[edit]

  1. ^ a b "MPEC 2011-C12 : 2011 CQ1". IAU Minor Planet Center. 2011-02-04. Retrieved 2013-02-27.  (K11C01Q)
  2. ^ a b c d e "JPL Close-Approach Data: (2011 CQ1)". 2011-02-04 last obs (arc=1 day). 
  3. ^ "2011 CQ1 Ephemerides for 4 February 2011". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2013-02-28. 
  4. ^ a b Don Yeomans and Paul Chodas (4 February 2011). "Very Small Asteroid Makes Close Earth Approach on February 4, 2011". News. NASA/JPL Near-Earth Object Program Office. Retrieved 18 September 2011. 
  5. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2012-03-19.