| Minorplanet: | yes |
| Background: |
|
| 556 Phyllis | |
| Mpc Name: | (556) Phyllis |
| Alt Names: | 1905 PW |
| Discovered: | 8 January 1905 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Eccentricity: | 0.10273 |
| Semimajor: | 2.4647AU |
| Perihelion: | 2.2115AU |
| Aphelion: | 2.7179abbr=onNaNabbr=on |
| Period: | 3.87 yr (1413.4 d) |
| Inclination: | 5.2400° |
| Asc Node: | 286.126° |
| Arg Peri: | 177.439° |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 108.29 yr (39553 d) |
| Uncertainty: | 0 |
| Abs Magnitude: | 9.56 |
| Rotation: | 4.293abbr=onNaNabbr=on |
| Mean Radius: | 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.