(5142) Okutama Main-belt Asteroid
Discovered on 18 December 1990 by Hioki, T., Hayakawa, S. at Okutama.
Where Okutama is today
Seen from above the solar system on 2026-10-14: Okutama is 1.99 au from the Sun and 1.27 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5142 |
| Provisional designation | 1990 YD |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.15 km (#8,717 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.388 |
| Rotation period | 3.80 hours |
| Spectral type | Sq |
| Absolute magnitude (H) | 12.99 |
| Orbital period | 4.05 years |
| Semi-major axis | 2.54 au |
| Perihelion – aphelion | 1.84 – 3.24 au |
| Eccentricity | 0.276 |
| Inclination | 6.29° |
| Closest distance between its orbit and Earth's (MOID) | 0.846 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.