2011 CQ1

2011 CQ1
Discovery[1]
Discovered byCatalina Sky Survey
Richard A. Kowalski
Discovery date4 February 2011
Designations
2011 CQ1
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 5
Observation arc12.4 hours[3]
(35 observations used)
Aphelion1.0087 AU (150.90 Gm) (Q)
Perihelion0.66454 AU (99.414 Gm) (q)
0.83661 AU (125.155 Gm) (a)
Eccentricity0.20567 (e)
0.77 yr (279.5 d)
18.607° (M)
1.2880°/day (n)
Inclination5.2445° (i)
315.23° (Ω)
335.40° (ω)
Earth MOID0.000166307 AU (24,879.2 km)
Jupiter MOID4.09715 AU (612.925 Gm)
Physical characteristics
Dimensions~2 meters (79 in)
14.2 (2011 peak)[4]
32.1[2]

2011 CQ1 is a meteoroid discovered on 4 February 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.[5] 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 between 80 centimeters (31 in) and 2.6 meters (100 in) wide.[5] The meteoroid was removed from the Sentry Risk Table on 5 February 2011.[6]

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°

It was not until 2020 QG on 16 August 2020 that a non-impacting closer approach to Earth was observed.

Animation of 2011 CQ1's orbit - 2011 flyby
Around the Sun
Around the Earth
   Sun ·   2011 CQ1 ·   Earth
  1. ^ a b Cite error: The named reference MPEC2011-C12 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference jpl-close was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference MPC was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference NEODyS2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference news170 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference removed was invoked but never defined (see the help page).