2014 OO6

2014 OO₆
Discovery
Discovered by	Pan-STARRS (F51)
Discovery date	27 July 2014
Designations
MPC designation	2014 OO6
Minor planet category	Apollo; NEO;
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 4
Observation arc	154 days
Aphelion	3.6991 AU (553.38 Gm) (Q)
Perihelion	0.70742 AU (105.829 Gm) (q)
Semi-major axis	2.2032 AU (329.59 Gm) (a)
Eccentricity	0.67892 (e)
Orbital period (sidereal)	3.27 yr (1194.5 d)
Mean anomaly	140.83° (M)
Mean motion	0° 18m 4.968s / day (n)
Inclination	1.3817° (i)
Longitude of ascending node	111.17° (Ω)
Argument of perihelion	287.34° (ω)
Earth MOID	0.000161353 AU (24,138.1 km)
Physical characteristics
Dimensions	~75 meters; 60–140 meters;
Absolute magnitude (H)	23.1

2014 OO₆ (also written 2014 OO6) is an Apollo near-Earth asteroid discovered in 2014 and was the most dangerous one discovered in 2014 that remained on the Sentry Risk Table as of early December 2014.^[3] The asteroid is estimated to be roughly 75 meters (246 ft) in diameter and had a 1 in 83,000 chance of impacting Earth on 11 January 2051.^[3] However, the nominal best-fit orbit shows that 2014 OO₆ will be 1.5 AU (220,000,000 km; 140,000,000 mi) from Earth on 11 January 2051.^[5]

It was discovered on 27 July 2014 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.^[1] On 18 August 2014 the asteroid passed 0.02975 AU (4,451,000 km; 2,765,000 mi) from Earth.^[6] By 23 August 2014, the asteroid had dimmed to below magnitude 25.^[7] As of early December 2014, the asteroid had an observation arc of 24 days with an uncertainty parameter of 7.^[2] 2014 OO₆ was recovered by Cerro Paranal Observatory on 23 and 26 December 2014 at magnitude 25 which extended the observation arc from 24 days to 154 days.^[8] The orbital refinement removed the impact risk for 11 January 2051.^[3]

With an absolute magnitude of 23.1,^[2] the asteroid is about 60–140 meters in diameter.^[4]

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