556 Phyllis

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

{{Infobox planet

| minorplanet= yes

| image= 556Phyllis (Lightcurve Inversion).png

| image_scale =

| caption= A three-dimensional model of 556 Phyllis based on its light curve

| background= #D6D6D6

| name= 556 Phyllis

| pronounced={{IPAc-en|'|f|ɪ|l|ᵻ|s}} {{respell|FIL|iss}}

| mpc_name= (556) Phyllis

| alt_names= 1905 PW

| discoverer= Paul Götz

| discovered= 8 January 1905

| discovery_site= Heidelberg

| epoch= 31 July 2016 (JD 2457600.5)

| eccentricity= 0.10273

| semimajor= {{Convert|2.4647|AU|Gm|abbr=on}}

| perihelion= {{Convert|2.2115|AU|Gm|abbr=on}}

| aphelion= {{Convert|2.7179|AU|Gm|abbr=on|lk=on}}

| period= 3.87 yr (1413.4 d)

| inclination= 5.2400°

| asc_node= 286.126°

| arg_peri= 177.439°

| mean_anomaly= 301.06°

| mean_motion= {{Deg2DMS|0.25471|sup=ms}} / day

| orbit_ref= {{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=556;cad=1 |title=556 Phyllis (1905 PW) |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=5 May 2016}}

| observation_arc= 108.29 yr (39553 d)

| uncertainty= 0

| abs_magnitude= 9.56

| rotation= {{Convert|4.293|h|d|abbr=on|lk=on}}

| albedo= {{val|0.1853|0.011}}

| mean_radius= {{val|18.905|0.55}} km

}}

556 Phyllis is a minor planet orbiting the Sun. It is an S-type asteroid with a diameter of 38 km and a geometric albedo of 0.185. Based on photometric observations between 1998 and 2006, it has a synodic rotation period of 4.293 ± 0.001 hours. The asteroid is named after Phyllis, a character in Greek mythology.