![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Animation_of_2011_CQ1_around_Sun.gif/640px-Animation_of_2011_CQ1_around_Sun.gif&w=640&q=50)
2011 CQ1
2nd closest non-impacting Earth approach / From Wikipedia, the free encyclopedia
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]
More information Parameter, Epoch ...
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° |
Close
Quick Facts Discovery, Discovered by ...
Discovery[1] | |
---|---|
Discovered by | Catalina Sky Survey Richard A. Kowalski |
Discovery date | 4 February 2011 |
Designations | |
2011 CQ1 | |
Orbital characteristics[2] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 5 | |
Observation arc | 12.4 hours[3] (35 observations used) |
Aphelion | 1.0087 AU (150.90 Gm) (Q) |
Perihelion | 0.66454 AU (99.414 Gm) (q) |
0.83661 AU (125.155 Gm) (a) | |
Eccentricity | 0.20567 (e) |
0.77 yr (279.5 d) | |
18.607° (M) | |
1.2880°/day (n) | |
Inclination | 5.2445° (i) |
315.23° (Ω) | |
335.40° (ω) | |
Earth MOID | 0.000166307 AU (24,879.2 km) |
Jupiter MOID | 4.09715 AU (612.925 Gm) |
Physical characteristics | |
Dimensions | ~2 meters (79 in) |
14.2 (2011 peak)[4] | |
32.1[2] | |
Close
It was not until 2020 QG on 16 August 2020 that a non-impacting closer approach to Earth was observed.