(1613) Smiley Main-belt Asteroid
Discovered on 16 September 1950 by S. J. Arend at Uccle.
Where Smiley is today
Seen from above the solar system on 2026-10-14: Smiley is 3.26 au from the Sun and 3.22 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1613 |
| Provisional designation | 1950 SD |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.2 km (#2,462 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0680 |
| Rotation period | 80.6 hours |
| Spectral type | Cgh |
| Absolute magnitude (H) | 11.74 |
| Orbital period | 4.53 years |
| Semi-major axis | 2.74 au |
| Perihelion – aphelion | 2.03 – 3.45 au |
| Eccentricity | 0.260 |
| Inclination | 7.97° |
| Closest distance between its orbit and Earth's (MOID) | 1.05 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.