(684) Hildburg Main-belt Asteroid
Discovered on 8 August 1909 by A. Kopff at Heidelberg.
Where Hildburg is today
Seen from above the solar system on 2026-10-14: Hildburg is 2.35 au from the Sun and 2.79 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 684 |
| Provisional designation | A909 PB |
| Orbit class | Main-belt Asteroid |
| Diameter | 19.0 km (#2,346 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.238 |
| Rotation period | 11.9 hours |
| Absolute magnitude (H) | 10.88 |
| Orbital period | 3.79 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 2.35 – 2.52 au |
| Eccentricity | 0.0354 |
| Inclination | 5.52° |
| Closest distance between its orbit and Earth's (MOID) | 1.34 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
- (591) Irmgard
- (593) Titania
- (595) Polyxena
- (596) Scheila
- (606) Brangane
- (607) Jenny
- (608) Adolfine
← (683) Lanzia · (685) Hermia →