2018 CL

2018 CL is a small asteroid and a near-Earth object of the Aten group, approximately 50 metres (160 feet) in diameter. It was the first confirmed finding, detected on 5 February 2018, announced on 8 February 2018, of the Zwicky Transient Facility project, located at Palomar Observatory, California, in the United States.^[2][4]

2018 CL

Discovery[1][2]
Discovered by	Zwicky Transient Facility
Discovery site	Palomar Obs.
Discovery date	5 February 2018
Designations
MPC designation	2018 CL
Minor planet category	NEO · Aten[1][3]
Orbital characteristics[3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 6
Observation arc	2 days
Aphelion	1.0606 AU
Perihelion	0.6484 AU
Semi-major axis	0.8545 AU
Eccentricity	0.2412
Orbital period (sidereal)	0.79 yr (289 days)
Mean anomaly	294.91°
Mean motion	1° 14m 52.08s / day
Inclination	11.847°
Longitude of ascending node	136.30°
Argument of perihelion	141.70°
Earth MOID	0.0046 AU (1.8 LD)
Physical characteristics
Mean diameter	50 m (160 ft)[2]
Apparent magnitude	25.5–15 (at closest approach)[2]
Absolute magnitude (H)	25.525[3]