2014 OL339

2014 OL₃₃₉
Discovery
Discovered by	EURONEAR; (unofficial credits)
Discovery site	La Palma Obs.; (first observed)
Discovery date	29 July 2014
Designations
MPC designation	2014 OL339
Minor planet category	NEO; Aten; Venus crosser; Earth crosser;
Orbital characteristics
	Epoch 16 February 2017 (JD 2457800.5)
	Uncertainty parameter 1
Observation arc	2.10 yr (768 days)
Aphelion	1.4598 AU
Perihelion	0.5388 AU
Semi-major axis	0.9993 AU
Eccentricity	0.4608
Orbital period (sidereal)	1.00 yr (365 days)
Mean anomaly	285.00°
Mean motion	0° 59m 12.12s / day
Inclination	10.187°
Longitude of ascending node	252.18°
Argument of perihelion	289.69°
Earth MOID	0.0179 AU
Physical characteristics
Dimensions	170 m (est. at 0.25)
Absolute magnitude (H)	22.9

2014 OL₃₃₉ (also written 2014 OL339) is an Aten asteroid that is a temporary quasi-satellite of Earth, the fourth known Earth quasi-satellite.

Discovery
Discovered by	EURONEAR (unofficial credits)
Discovery site	La Palma Obs. (first observed)
Discovery date	29 July 2014
Designations
MPC designation	2014 OL₃₃₉
Minor planet category	NEO Aten Venus crosser Earth crosser
Orbital characteristics
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 1
Observation arc	2.10 yr (768 days)
Aphelion	1.4598 AU
Perihelion	0.5388 AU
Semi-major axis	0.9993 AU
Eccentricity	0.4608
Orbital period (sidereal)	1.00 yr (365 days)
Mean anomaly	285.00°
Mean motion	0° 59^m 12.12^s / day
Inclination	10.187°
Longitude of ascending node	252.18°
Argument of perihelion	289.69°
Earth MOID	0.0179 AU
Physical characteristics
Dimensions	170 m (est. at 0.25)
Absolute magnitude (H)	22.9