579 Sidonia

{{Use dmy dates|date=October 2019}}

{{Infobox planet

| minorplanet= yes

| background= #D6D6D6

| name= 579 Sidonia

| mpc_name= (579) Sidonia

| pronounced={{IPAc-en|s|aɪ|'|d|oʊ|n|i|ə}}{{Cite encyclopedia |url=http://www.lexico.com/definition/Sidonian |archive-url=https://web.archive.org/web/20200915121200/https://www.lexico.com/definition/sidonian |url-status=dead |archive-date=15 September 2020 |title=Sidonian |dictionary=Lexico UK English Dictionary |publisher=Oxford University Press}}

| alt_names= 1905 SD

| discoverer= A. Kopff

| discovered= 3 November 1905

| discovery_site= Heidelberg

| epoch= 31 July 2016 (JD 2457600.5)

| orbit_ref=

| eccentricity= 0.080631

| semimajor= {{Convert|3.0107|AU|Gm|abbr=on}}

| perihelion= {{Convert|2.7680|AU|Gm|abbr=on}}

| aphelion= {{Convert|3.2535|AU|Gm|abbr=on|lk=on}}

| period= 5.22 yr (1908.1 d)

| inclination= 11.009°

| asc_node= 82.737°

| arg_peri= 228.785°

| mean_anomaly= 161.100°

| abs_magnitude= 8.07
7.85

| mean_motion= {{Deg2DMS|0.18867|sup=ms}} / day

| observation_arc= 109.22 yr (39891 d)

| uncertainty= 0

| rotation= {{Convert|16.286|h|d|abbr=on|lk=on}}

| albedo= {{val|0.1748|0.009}}

| mean_radius= {{val|42.785|1.1}} km

}}

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.

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.