(3649) Guillermina Main-belt Asteroid
Discovered on 26 April 1976 by Felix Aguilar Observatory at El Leoncito.
Where Guillermina is today
Seen from above the solar system on 2026-10-14: Guillermina is 3.00 au from the Sun and 3.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3649 |
| Provisional designation | 1976 HQ |
| Orbit class | Main-belt Asteroid |
| Diameter | 21.9 km (#1,988 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0540 |
| Rotation period | 3.88 hours |
| Absolute magnitude (H) | 12.22 |
| Orbital period | 5.57 years |
| Semi-major axis | 3.14 au |
| Perihelion – aphelion | 2.99 – 3.30 au |
| Eccentricity | 0.0492 |
| Inclination | 7.16° |
| Closest distance between its orbit and Earth's (MOID) | 1.99 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.