(2560) Siegma Main-belt Asteroid
Discovered on 14 February 1932 by K. Reinmuth at Heidelberg.
Where Siegma is today
Seen from above the solar system on 2026-10-14: Siegma is 2.66 au from the Sun and 2.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2560 |
| Provisional designation | 1932 CW |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.0 km (#2,502 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0990 |
| Rotation period | 10.3 hours |
| Spectral type | Xc |
| Absolute magnitude (H) | 12.07 |
| Orbital period | 4.56 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.66 – 2.84 au |
| Eccentricity | 0.0335 |
| Inclination | 5.95° |
| Closest distance between its orbit and Earth's (MOID) | 1.68 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.