(591) Irmgard Main-belt Asteroid
Discovered on 14 March 1906 by A. Kopff at Heidelberg.
Where Irmgard is today
Seen from above the solar system on 2026-10-14: Irmgard is 3.21 au from the Sun and 2.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 591 |
| Provisional designation | A906 EE |
| Orbit class | Main-belt Asteroid |
| Diameter | 51.9 km (#712 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0364 |
| Rotation period | 7.35 hours |
| Spectral type | X |
| Absolute magnitude (H) | 10.63 |
| Orbital period | 4.38 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.12 – 3.24 au |
| Eccentricity | 0.210 |
| Inclination | 12.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.13 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by A. Kopff
- (579) Sidonia
- (582) Olympia
- (584) Semiramis
- (585) Bilkis
- (589) Croatia
- (593) Titania
- (595) Polyxena
- (596) Scheila
- (606) Brangane
- (607) Jenny
- (608) Adolfine
- (612) Veronika
← (590) Tomyris · (592) Bathseba →