(4217) Engelhardt Main-belt Asteroid
Discovered on 24 January 1988 by C. S. Shoemaker at Palomar.
Where Engelhardt is today
Seen from above the solar system on 2026-10-14: Engelhardt is 2.65 au from the Sun and 3.08 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4217 |
| Provisional designation | 1988 BO2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.74 km (#5,966 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.231 |
| Rotation period | 3.07 hours |
| Absolute magnitude (H) | 12.53 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.82 – 2.80 au |
| Eccentricity | 0.212 |
| Inclination | 23.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.821 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.