(7909) Ziffer Main-belt Asteroid
Discovered on 30 September 1975 by S. J. Bus at Palomar.
Julie Ziffer (b. 1974) is a professor of physics at the University of Southern Maine, Portland, ME. Her research contributions include spectroscopic studies of primitive carbonaceous minor planets.Naming citation (20120506/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ziffer is today
Seen from above the solar system on 2026-10-14: Ziffer is 2.62 au from the Sun and 1.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7909 |
| Provisional designation | 1975 SK |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.0 km (#4,567 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0680 |
| Absolute magnitude (H) | 13.61 |
| Orbital period | 5.65 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.61 – 3.73 au |
| Eccentricity | 0.177 |
| Inclination | 2.39° |
| Closest distance between its orbit and Earth's (MOID) | 1.62 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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