(4255) Spacewatch Outer Main-belt Asteroid
Discovered on 4 April 1986 by Spacewatch at Kitt Peak.
Where Spacewatch is today
Seen from above the solar system on 2026-10-14: Spacewatch is 3.39 au from the Sun and 3.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4255 |
| Provisional designation | 1986 GW |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 15.1 km (#3,118 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0300 |
| Rotation period | 20.0 hours |
| Absolute magnitude (H) | 13.31 |
| Orbital period | 7.95 years |
| Semi-major axis | 3.98 au |
| Perihelion – aphelion | 3.39 – 4.57 au |
| Eccentricity | 0.149 |
| Inclination | 2.61° |
| Closest distance between its orbit and Earth's (MOID) | 2.38 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.