577 Rhea

{{Short description|Main-belt asteroid}}

{{Distinguish|text=Saturn's moon Rhea}}

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

{{Infobox planet

| minorplanet= yes

| name= 577 Rhea

| background = #D6D6D6

| image = 000577-asteroid shape model (577) Rhea.png

| image_scale =

| caption = Modelled shape of Rhea from its lightcurve

| mpc_name= (577) Rhea

| pronounced={{IPAc-en|'|r|iː|ə}}Noah Webster (1884) A Practical Dictionary of the English Language

| alt_names= 1905 RH

| discoverer= M. F. Wolf

| discovered= 20 October 1905

| discovery_site= Heidelberg

| epoch= 31 July 2016 (JD 2457600.5)

| eccentricity= 0.15481

| semimajor= {{Convert|3.1114|AU|Gm|abbr=on}}

| perihelion= {{Convert|2.6297|AU|Gm|abbr=on}}

| aphelion= {{Convert|3.5931|AU|Gm|abbr=on|lk=on}}

| period= 5.49 yr (2004.6 d)

| inclination= 5.2964°

| asc_node= 328.579°

| arg_peri= 330.784°

| mean_anomaly= 105.219°

| mean_motion= {{Deg2DMS|0.17959|sup=ms}} / day

| orbit_ref= {{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=577;cad=1 |archive-url=https://web.archive.org/web/20200918015923/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=577;cad=1 |url-status=dead |archive-date=18 September 2020 |title=577 Rhea (1905 RH) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=5 May 2016}}

| observation_arc= 110.32 yr (40296 d)

| uncertainty= 0

| abs_magnitude= 9.4

| rotation= {{Convert|12.249|h|d|abbr=on|lk=on}}

| albedo= {{val|0.1792|0.023}}

| mean_radius= {{val|19.765|1.15}} km

}}

577 Rhea is a minor planet orbiting the Sun. It is named after Rhea, one of the Titans in Greek mythology. The name may have been inspired by the asteroid's provisional designation 1905 RH.