823 Sisigambis

823 Sisigambis is an asteroid belonging to the Flora family in the Main Belt. Its diameter is about 17 km, and it has an albedo of 0.179.^[3] Its rotation period is unknown but appears to be greater than at least 12 hours.^[4][5] The asteroid is named after Sisygambis, the mother of Darius III of Persia.

823 Sisigambis

Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg
Discovery date	31 March 1916
Designations
MPC designation	(823) Sisigambis
Pronunciation	/sɪsɪˈɡæmbɪs/[1]
Alternative designations	1916 ZG; A913 JB; 1937 QE; 1939 FA1; 1969 FN
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	100.04 yr (36540 d)
Aphelion	2.4213 AU (362.22 Gm)
Perihelion	2.0211 AU (302.35 Gm)
Semi-major axis	2.2212 AU (332.29 Gm)
Eccentricity	0.090088
Orbital period (sidereal)	3.31 yr (1209.2 d)
Mean anomaly	176.61°
Mean motion	0° 17m 51.828s / day
Inclination	3.6456°
Longitude of ascending node	255.028°
Argument of perihelion	218.602°
Earth MOID	1.03763 AU (155.227 Gm)
Jupiter MOID	2.65835 AU (397.683 Gm)
TJupiter	3.641
Physical characteristics
Mean radius	8.315±0.7 km
Synodic rotation period	146 h (6.1 d)
Geometric albedo	0.1793±0.034
Absolute magnitude (H)	11.2

Captured by Alexander the Great at the Battle of Issus, Sisygambis became devoted to him, and Alexander referred to her as "mother". Having learned of Alexander's death, she had become depressed and had herself sealed into her rooms and refused to eat. She is said to have died of grief and starvation four days later.^[6][7]