584 Semiramis
Semiramis (minor planet designation: 584 Semiramis) is a minor planet orbiting the Sun within the main asteroid belt. Photometric observations at the Mark Evans Observatory during 2014 gave a rotation period of 5.0689 ± 0.0001 hours. This value is in close agreement with previous studies. The spectrum shows it to be a stony S(IV)-type asteroid.
A three-dimensional model of 584 Semiramis based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | A. Kopff |
| Discovery site | Heidelberg |
| Discovery date | 15 January 1906 |
| Designations | |
| (584) Semiramis | |
| Pronunciation | /sɪˈmɪrəmɪs/ |
Named after | Semiramis |
| 1906 SY | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.26 yr (40272 d) |
| Aphelion | 2.9282 AU (438.05 Gm) |
| Perihelion | 1.8224 AU (272.63 Gm) |
| 2.3753 AU (355.34 Gm) | |
| Eccentricity | 0.23276 |
| 3.66 yr (1337.1 d) | |
| 166.35° | |
| 0° 16m 9.228s / day | |
| Inclination | 10.718° |
| 282.159° | |
| 85.121° | |
| Physical characteristics | |
Mean radius | 27.005±0.7 km 25.89 ± 1.075 km |
| Mass | (8.23 ± 5.77) × 1017 kg |
| 5.068 h (0.2112 d) | |
| 0.1987±0.011 | |
| 8.71 | |
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