2011 CQ1
| Discovery | |
|---|---|
| Discovered by | Catalina Sky Survey Richard A. Kowalski |
| Discovery date | 4 February 2011 |
| Designations | |
| 2011 CQ1 | |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 12.4 hours (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) | |
| 32.1 | |
2011 CQ1 is a meteoroid discovered on 4 February 2011 by Richard A. Kowalski, at the Catalina Sky Survey. 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. With a relative velocity of only 9.7 km/s, 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. The meteoroid was removed from the Sentry Risk Table on 5 February 2011.
| 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.
