(5549) Bobstefanik Main-belt Asteroid
Discovered on 1 April 1981 by Harvard Observatory at Harvard.
Where Bobstefanik is today
Seen from above the solar system on 2026-10-14: Bobstefanik is 2.41 au from the Sun and 2.98 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5549 |
| Provisional designation | 1981 GM1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.39 km (#8,388 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.328 |
| Rotation period | 3.18 hours |
| Absolute magnitude (H) | 13.22 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.35 – 2.84 au |
| Eccentricity | 0.0959 |
| Inclination | 13.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.35 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.