(3169) Ostro Inner Main-belt Asteroid
Discovered on 4 June 1981 by E. Bowell at Anderson Mesa.
Where Ostro is today
Seen from above the solar system on 2026-10-14: Ostro is 1.83 au from the Sun and 1.35 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3169 |
| Provisional designation | 1981 LA |
| Orbit class | Inner Main-belt Asteroid |
| Diameter | 4.66 km (#11,309 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.960 |
| Rotation period | 6.50 hours |
| Spectral type | TS |
| Absolute magnitude (H) | 12.85 |
| Orbital period | 2.60 years |
| Semi-major axis | 1.89 au |
| Perihelion – aphelion | 1.77 – 2.02 au |
| Eccentricity | 0.0668 |
| Inclination | 24.9° |
| Closest distance between its orbit and Earth's (MOID) | 0.796 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.