| Name | |
|---|---|
| Name | Zachia |
| Designation | 1923 NW |
| Discovery | |
| Discoverer | K. Reinmuth |
| Discovery date | August 9, 1923 |
| Discovery site | Heidelberg |
| Orbital elements | |
| Epoch August 18, 2005 (JDCT 2453600.5) | |
| Eccentricity (e) | 0.216 |
| Semimajor axis (a) | 2.612 AU |
| Perihelion (q) | 2.047 AU |
| Aphelion (Q) | 3.176 AU |
| Orbital period (P) | 4.221 a |
| Inclination (i) | 9.768° |
| Longitude of the ascending node (Ω) | 215.194° |
| Argument of Perihelion (ω) | 127.748° |
| Mean anomaly (M) | 138.908° |
999 Zachia is a main-belt asteroid named after Austrian astronomer Franz Xaver von Zach.
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