| Minorplanet: | yes |
| Background: |
|
| 590 Tomyris | |
| Mpc Name: | (590) Tomyris |
| Pronounced: | [1] |
| Alt Names: | 1906 TO |
| Discovered: | 4 March 1906 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Eccentricity: | 0.080570 |
| Semimajor: | 2.9979AU |
| Perihelion: | 2.7564AU |
| Aphelion: | 3.2395abbr=onNaNabbr=on |
| Period: | 5.19 yr (1896.0 d) |
| Inclination: | 11.174° |
| Asc Node: | 106.157° |
| Arg Peri: | 339.791° |
| Mean Motion: | / day |
| Orbit Ref: | [2] |
| Observation Arc: | 110.12 yr (40221 d) |
| Uncertainty: | 0 |
| Abs Magnitude: | 9.90 |
| Rotation: | 5.562abbr=onNaNabbr=on |
| Mean Radius: | km |
590 Tomyris is a minor planet orbiting the Sun. Its name derives from the Massagetean (ancient Eastern Iranian) ruler Tomyris, and may have been inspired by the asteroid's provisional designation 1906 TO.