(4613) Mamoru Main-belt Asteroid
Discovered on 22 July 1990 by K. Watanabe at Sapporo.
Where Mamoru is today
Seen from above the solar system on 2026-10-14: Mamoru is 2.73 au from the Sun and 3.47 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4613 |
| Provisional designation | 1990 OM |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.9 km (#4,630 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.284 |
| Rotation period | 5.39 hours |
| Absolute magnitude (H) | 11.85 |
| Orbital period | 4.35 years |
| Semi-major axis | 2.67 au |
| Perihelion – aphelion | 1.86 – 3.47 au |
| Eccentricity | 0.301 |
| Inclination | 6.66° |
| Closest distance between its orbit and Earth's (MOID) | 0.884 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.