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2011 CQ1
Apollo asteroid
Apollo asteroid
| Field | Value |
|---|---|
| minorplanet | yes |
| background | #FFC2E0 |
| name | |
| discovery_ref | |
| discoverer | Catalina Sky Survey |
| Richard A. Kowalski | |
| discovered | 4 February 2011 |
| mpc_name | |
| mp_category | {{Hlist |
| NEO<ref name | "jpl-close"/ |
| orbit_ref | |
| epoch | 13 January 2016 (JD 2457400.5) |
| uncertainty | 5 |
| observation_arc | 12.4 hours |
| (35 observations used) | |
| aphelion | 1.0087 AU (Q) |
| perihelion | 0.66454 AU (q) |
| semimajor | 0.83661 AU (a) |
| eccentricity | 0.20567 (e) |
| period | 0.77 yr (279.5 d) |
| inclination | 5.2445° (i) |
| asc_node | 315.23° (Ω) |
| mean_anomaly | 18.607° (M) |
| arg_peri | 335.40° (ω) |
| dimensions | ~2 m |
| magnitude | 14.2 (2011 peak) |
| abs_magnitude | 32.1 |
| mean_motion | 1.2880°/day (n) |
| moid | 0.000166307 AU |
| jupiter_moid | 4.09715 AU |
Richard A. Kowalski | Aten | NEO (35 observations used) **** 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 (5480 km 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 cm and 2.6 m 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 | Post-flyby | ||||||||||
| 2011-Jan-26 | 1.347 | 0.9096 | 1.128 | 0.1940 | 437.9 | 1.073° | 135.4° | 310.9° | 58.59° | |||||||
| 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.
References
|archive-url=https://web.archive.org/web/20210628080527/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011CQ1&cad=1 |archive-date=2021-06-28 |url-status=live |access-date=31 March 2016}}
|archive-url=https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html |url-status=dead |archive-date=2002-06-02
References
- Don Yeomans. (4 February 2011). "Very Small Asteroid Makes Close Earth Approach on 4 February 2011". NASA/JPL Near-Earth Object Program Office.
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