(4006) Sandler Main-belt Asteroid
Discovered on 29 December 1972 by T. M. Smirnova at Nauchnyj.
Where Sandler is today
Seen from above the solar system on 2026-10-14: Sandler is 2.94 au from the Sun and 3.60 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4006 |
| Provisional designation | 1972 YR |
| Orbit class | Main-belt Asteroid |
| Diameter | 15.9 km (#2,919 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0710 |
| Rotation period | 3.40 hours |
| Absolute magnitude (H) | 12.79 |
| Orbital period | 3.99 years |
| Semi-major axis | 2.51 au |
| Perihelion – aphelion | 2.05 – 2.98 au |
| Eccentricity | 0.184 |
| Inclination | 2.39° |
| Closest distance between its orbit and Earth's (MOID) | 1.06 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.