(7140) Osaki Main-belt Asteroid
Discovered on 4 March 1994 by T. Kobayashi at Oizumi.
Yoji Osaki (b. 1938) works mainly in stellar physics and served as president of the Japan Astronomical Society during 1999-2000. In 1974 he proposed the disk-instability model for outbursts of dwarf novae, a model that is now widely accepted.Naming citation (20020624/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Osaki is today
Seen from above the solar system on 2026-10-14: Osaki is 2.01 au from the Sun and 1.24 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7140 |
| Provisional designation | 1994 EE1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.55 km (#11,516 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.372 |
| Absolute magnitude (H) | 13.73 |
| Orbital period | 3.41 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.77 – 2.76 au |
| Eccentricity | 0.219 |
| Inclination | 4.59° |
| Closest distance between its orbit and Earth's (MOID) | 0.768 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.