(1240) Centenaria Main-belt Asteroid
Discovered on 5 February 1932 by R. Schorr at Bergedorf.
Where Centenaria is today
Seen from above the solar system on 2026-10-14: Centenaria is 2.54 au from the Sun and 2.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1240 |
| Provisional designation | 1932 CD |
| Orbit class | Main-belt Asteroid |
| Diameter | 63.0 km (#548 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0560 |
| Rotation period | 11.3 hours |
| Absolute magnitude (H) | 10.17 |
| Orbital period | 4.85 years |
| Semi-major axis | 2.87 au |
| Perihelion – aphelion | 2.36 – 3.37 au |
| Eccentricity | 0.175 |
| Inclination | 10.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.36 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.