(9405) Johnratje Main-belt Asteroid
Discovered on 27 November 1994 by T. Kobayashi at Oizumi.
Since 1993 John R. Ratje (b. 1946) has been the assistant director and site manager of Mt. Graham International Observatory, a division of Steward Observatory. Before joining Steward Observatory in 1984, he was an oil-company engineer and manager.Naming citation (20111012/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Johnratje is today
Seen from above the solar system on 2026-10-14: Johnratje is 3.01 au from the Sun and 3.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9405 |
| Provisional designation | 1994 WQ1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.06 km (#8,837 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.192 |
| Rotation period | 3.25 hours |
| Absolute magnitude (H) | 13.4 |
| Orbital period | 4.87 years |
| Semi-major axis | 2.87 au |
| Perihelion – aphelion | 2.68 – 3.07 au |
| Eccentricity | 0.0680 |
| Inclination | 2.73° |
| Closest distance between its orbit and Earth's (MOID) | 1.69 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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