(13688) Oklahoma Main-belt Asteroid
Discovered on 9 September 1997 by T. Stafford at Zeno.
Oklahoma is a U.S. state, and this was the first minor planet to be discovered from an observatory there.Naming citation (20000523/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Oklahoma is today
Seen from above the solar system on 2026-10-14: Oklahoma is 3.33 au from the Sun and 2.84 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13688 |
| Provisional designation | 1997 RJ7 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.02 km (#7,621 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.206 |
| Absolute magnitude (H) | 13.46 |
| Orbital period | 5.59 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.68 – 3.62 au |
| Eccentricity | 0.148 |
| Inclination | 5.68° |
| Closest distance between its orbit and Earth's (MOID) | 1.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.