2015 FJ345

2015 FJ₃₄₅
Discovery
Discovered by	Mauna Kea Obs.
Discovery site	Mauna Kea Obs.; (first observed only)
Discovery date	17 March 2015
Designations
MPC designation	2015 FJ345
Minor planet category	TNO; detached; SDO; distant;
Orbital characteristics
	Epoch 27 April 2019 (JD 2458600.5)
	Uncertainty parameter 6; 4;
Observation arc	1.13 yr (413 d)
Aphelion	74.837 AU
Perihelion	50.785 AU
Semi-major axis	62.811 AU
Eccentricity	0.1915
Orbital period (sidereal)	497.81 yr (181,824 d)
Mean anomaly	58.879°
Mean motion	0° 0m 7.2s / day
Inclination	34.973°
Longitude of ascending node	37.881°
Argument of perihelion	77.511°
Physical characteristics
Mean diameter	117 km; 119 km; 125±25 km;
Geometric albedo	0.08 (assumed); 0.09 (assumed);
Apparent magnitude	25.74
Absolute magnitude (H)	7.9

2015 FJ₃₄₅ is a trans-Neptunian object and detached object, located in the scattered disc, the outermost region of the Solar System. It was first observed on 17 March 2015, by a team led by American astronomer Scott Sheppard at the Mauna Kea Observatories, in Hawaii, United States. With its perihelion of almost 51 AU, it belongs to a small and poorly understood group of very distant objects with moderate eccentricities.^[7]^[9] The object is not a dwarf planet candidate as it only measures approximately 120 kilometers (75 miles) in diameter.

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