21436 Chaoyichi

21436 Chaoyichi (provisional designation 1998 FL₁₁₆) is a background asteroid and binary system^[2] from the inner region of the asteroid belt, approximately 2 kilometers in diameter. It was discovered on 31 March 1998, by astronomers of the Lincoln Near-Earth Asteroid Research at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, United States.^[1]

21436 Chaoyichi

Discovery
Discovered by	LINEAR
Discovery site	Lincoln Lab ETS
Discovery date	31 March 1998
Designations
MPC designation	(21436) Chaoyichi
Alternative designations	1998 FL116
Minor planet category	main-belt · background
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	9565 days (26.19 yr)
Aphelion	2.3725454 AU (354.92774 Gm)
Perihelion	2.0008870 AU (299.32843 Gm)
Semi-major axis	2.186716 AU (327.1281 Gm)
Eccentricity	0.0849810
Orbital period (sidereal)	3.23 yr (1181.1 d)
Mean anomaly	226.1171°
Mean motion	0° 18m 17.281s / day
Inclination	3.736916°
Longitude of ascending node	320.37494°
Argument of perihelion	178.30874°
Known satellites	1[2]
Physical characteristics
Mean diameter	1.953±0.256 km[1]
Synodic rotation period	2.87 h[1][3]
Geometric albedo	0.222±0.062[1]
Absolute magnitude (H)	15.4[1]