(13509) Guayaquil Main-belt Asteroid
Discovered on 4 April 1989 by E. W. Elst at La Silla.
Guayaquil is the largest and the most populated city in Ecuador. Founded in 1538 by the conquistador F. de Orellana, it is located on the western bank of the Guayas River, which flows into the Pacific Ocean.Naming citation (MPC batch dated 2015-08-29), IAU / Minor Planet Center, via NASA/JPL
Where Guayaquil is today
Seen from above the solar system on 2026-10-14: Guayaquil is 2.70 au from the Sun and 2.31 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13509 |
| Provisional designation | 1989 GU3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.2 km (#4,973 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0340 |
| Absolute magnitude (H) | 14.52 |
| Orbital period | 3.89 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.23 – 2.72 au |
| Eccentricity | 0.0975 |
| Inclination | 4.12° |
| Closest distance between its orbit and Earth's (MOID) | 1.22 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.