(551) Ortrud Main-belt Asteroid
Discovered on 16 November 1904 by M. F. Wolf at Heidelberg.
Where Ortrud is today
Seen from above the solar system on 2026-10-14: Ortrud is 2.82 au from the Sun and 1.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 551 |
| Provisional designation | A904 WC |
| Orbit class | Main-belt Asteroid |
| Diameter | 81.1 km (#368 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0400 |
| Rotation period | 17.4 hours |
| Spectral type | XC |
| Absolute magnitude (H) | 9.79 |
| Orbital period | 5.11 years |
| Semi-major axis | 2.97 au |
| Perihelion – aphelion | 2.62 – 3.32 au |
| Eccentricity | 0.119 |
| Inclination | 0.394° |
| Closest distance between its orbit and Earth's (MOID) | 1.63 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 16 November 1904
More named asteroids discovered by M. F. Wolf
- (323) Brucia
- (325) Heidelberga
- (328) Gudrun
- (329) Svea
- (330) Adalberta
- (332) Siri
- (333) Badenia
- (334) Chicago
- (339) Dorothea
- (340) Eduarda
- (341) California
- (342) Endymion
← (550) Senta · (552) Sigelinde →