(5540) Smirnova Main-belt Asteroid
Discovered on 30 August 1971 by T. M. Smirnova at Nauchnyj.
Where Smirnova is today
Seen from above the solar system on 2026-10-14: Smirnova is 2.36 au from the Sun and 2.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5540 |
| Provisional designation | 1971 QR1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.61 km (#13,689 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.341 |
| Rotation period | 40.0 hours |
| Absolute magnitude (H) | 14.37 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 1.79 – 3.40 au |
| Eccentricity | 0.311 |
| Inclination | 4.58° |
| Closest distance between its orbit and Earth's (MOID) | 0.788 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.