284 Amalia

284 Amalia is a large main belt asteroid.^[2] It was discovered by Auguste Charlois on 29 May 1889 in Nice. This is classified as a Ch-type asteroid in the Bus taxonomy^[3] and CX in the Tholen system.^[4] It has been observed occulting stars on five occasions as of 2018, which provide a diameter estimate of 54±3 km via a fitted ellipse plot.^[5]

284 Amalia

Orbital diagram
Discovery
Discovered by	Auguste Charlois
Discovery date	29 May 1889
Designations
MPC designation	(284) Amalia
Pronunciation	/əˈmɑːliə/
Alternative designations	A889 KA
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	122.66 yr (44,800 d)
Aphelion	2.88122 AU (431.024 Gm)
Perihelion	1.83631 AU (274.708 Gm)
Semi-major axis	2.35876 AU (352.865 Gm)
Eccentricity	0.22149
Orbital period (sidereal)	3.62 yr (1,323.2 d)
Average orbital speed	19.39 km/s
Mean anomaly	0.0848612°
Mean motion	0° 16m 19.445s / day
Inclination	8.05647°
Longitude of ascending node	233.716°
Time of perihelion	2023-Oct-29
Argument of perihelion	58.0568°
Physical characteristics
Dimensions	52.95±2.6 km
Synodic rotation period	8.545 h (0.3560 d)
Geometric albedo	0.0602±0.006
Absolute magnitude (H)	10.05