(584) Semiramis Main-belt Asteroid
Discovered on 15 January 1906 by A. Kopff at Heidelberg.
Where Semiramis is today
Seen from above the solar system on 2026-10-14: Semiramis is 2.50 au from the Sun and 2.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 584 |
| Provisional designation | A906 AC |
| Orbit class | Main-belt Asteroid |
| Diameter | 54.0 km (#667 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.199 |
| Rotation period | 5.07 hours |
| Spectral type | S |
| Absolute magnitude (H) | 8.48 |
| Orbital period | 3.66 years |
| Semi-major axis | 2.37 au |
| Perihelion – aphelion | 1.82 – 2.93 au |
| Eccentricity | 0.233 |
| Inclination | 10.7° |
| Closest distance between its orbit and Earth's (MOID) | 0.856 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by A. Kopff
- (579) Sidonia
- (582) Olympia
- (585) Bilkis
- (589) Croatia
- (591) Irmgard
- (593) Titania
- (595) Polyxena
- (596) Scheila
- (606) Brangane
- (607) Jenny
- (608) Adolfine
- (612) Veronika
← (583) Klotilde · (585) Bilkis →