2011 CQ1

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]

DiscoveredbyCatalina Sky Survey
Richard A. Kowalski

Discoverydate4 February 2011

MPCdesignation

2011 CQ₁

Minorplanet category

• Aten
• NEO^[2]

Quick facts Discovery, Discovered by ...

2011 CQ₁

Discovery[1]
Discovered by	Catalina Sky Survey Richard A. Kowalski
Discovery date	4 February 2011
Designations
MPC designation	2011 CQ1
Minor planet category	Aten NEO[2]
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)
Semi-major axis	0.83661 AU (125.155 Gm) (a)
Eccentricity	0.20567 (e)
Orbital period (sidereal)	0.77 yr (279.5 d)
Mean anomaly	18.607° (M)
Mean motion	1.2880°/day (n)
Inclination	5.2445° (i)
Longitude of ascending node	315.23° (Ω)
Argument of perihelion	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)
Apparent magnitude	14.2 (2011 peak)[4]
Absolute magnitude (H)	32.1[2]

Close

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