859 Bouzaréah

859 Bouzaréah, provisional designation 1916 c, is a dark asteroid from the asteroid belt about 74 kilometers in diameter. It was discovered by French astronomer Frédéric Sy at the Algiers Observatory in Algeria, North Africa, on 2 October 1916.^[1]

859 Bouzaréah

Discovery[1]
Discovered by	F. Sy
Discovery site	Algiers Observatory
Discovery date	2 October 1916
Designations
MPC designation	(859) Bouzaréah
Named after	Bouzaréah[2]
Alternative designations	1916 c · 1928 YA A916 UN
Minor planet category	main-belt (outer)
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	99.57 yr (36368 days)
Aphelion	3.5698 AU (534.03 Gm)
Perihelion	2.8869 AU (431.87 Gm)
Semi-major axis	3.2284 AU (482.96 Gm)
Eccentricity	0.10577
Orbital period (sidereal)	5.80 yr (2118.7 d)
Mean anomaly	81.403°
Mean motion	0° 10m 11.712s / day
Inclination	13.511°
Longitude of ascending node	35.800°
Argument of perihelion	18.654°
Physical characteristics
Mean diameter	66±6 km[3] 67±6 km[3]
Synodic rotation period	23.2 h (0.97 d)
Geometric albedo	0.0467±0.003
Absolute magnitude (H)	9.7

The asteroid orbits the Sun at a distance of 2.9–3.6 AU about once every 6 years (2,117 days) and rotates around its axis in 23 hours.^[4] Its low geometric albedo of 0.047 has been measured by the Infrared Astronomical Satellite, IRAS.

The asteroid was named after Bouzaréah, location of the discovering observatory and suburb of the Algerian capital, Algiers.^[2] Its designation, 1916 c, is a superseded version of the modern two-letter code system of provisional designation, implemented just a few years later in 1925.