Tomyris (minor planet designation: 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.
![]() A three-dimensional model of 590 Tomyris based on its light curve | |
Discovery | |
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Discovered by | Max Wolf |
Discovery site | Heidelberg |
Discovery date | 4 March 1906 |
Designations | |
MPC designation | (590) Tomyris |
Pronunciation | /ˈtɒmɪrɪs/[1] |
Alternative designations | 1906 TO |
Orbital characteristics[2] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 110.12 yr (40221 d) |
Aphelion | 3.2395 AU (484.62 Gm) |
Perihelion | 2.7564 AU (412.35 Gm) |
Semi-major axis | 2.9979 AU (448.48 Gm) |
Eccentricity | 0.080570 |
Orbital period (sidereal) | 5.19 yr (1896.0 d) |
Mean anomaly | 166.534° |
Mean motion | 0° 11m 23.532s / day |
Inclination | 11.174° |
Longitude of ascending node | 106.157° |
Argument of perihelion | 339.791° |
Physical characteristics | |
Mean radius | 19.935±0.7 km |
Synodic rotation period | 5.562 h (0.2318 d) |
Geometric albedo | 0.1218±0.009 |
Absolute magnitude (H) | 9.90 |
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