579 Sidonia

579 Sidonia is a minor planet orbiting the Sun that was discovered by the German astronomer August Kopff on November 3, 1905. It was named after a character in Christoph Willibald Gluck's opera Armide. The name may have been inspired by the asteroid's provisional designation 1905 SD.

579 Sidonia

Discovery
Discovered by	A. Kopff
Discovery site	Heidelberg
Discovery date	3 November 1905
Designations
MPC designation	(579) Sidonia
Pronunciation	/saɪˈdoʊniə/[1]
Alternative designations	1905 SD
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	109.22 yr (39891 d)
Aphelion	3.2535 AU (486.72 Gm)
Perihelion	2.7680 AU (414.09 Gm)
Semi-major axis	3.0107 AU (450.39 Gm)
Eccentricity	0.080631
Orbital period (sidereal)	5.22 yr (1908.1 d)
Mean anomaly	161.100°
Mean motion	0° 11m 19.212s / day
Inclination	11.009°
Longitude of ascending node	82.737°
Argument of perihelion	228.785°
Physical characteristics
Mean radius	42.785±1.1 km
Synodic rotation period	16.286 h (0.6786 d)
Geometric albedo	0.1748±0.009
Absolute magnitude (H)	8.07[3] 7.85[2]

This is a member of the dynamic Eos family of asteroids that most likely formed as the result of a collisional breakup of a parent body.^[4]