(4677) Hiroshi Main-belt Asteroid
Discovered on 26 September 1990 by Takahashi, A., Watanabe, K. at Kitami.
Where Hiroshi is today
Seen from above the solar system on 2026-10-14: Hiroshi is 3.60 au from the Sun and 4.58 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4677 |
| Provisional designation | 1990 SQ4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.0 km (#3,403 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.143 |
| Absolute magnitude (H) | 12.89 |
| Orbital period | 5.54 years |
| Semi-major axis | 3.13 au |
| Perihelion – aphelion | 2.52 – 3.74 au |
| Eccentricity | 0.196 |
| Inclination | 0.480° |
| Closest distance between its orbit and Earth's (MOID) | 1.53 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.