Discovered by K. Reinmuth Alternative names 1923 NW Aphelion 3.1787 AU (475.53 Gm) Discovered 9 August 1923 Orbits Sun Asteroid group Asteroid belt | Discovery date 9 August 1923 Observation arc 92.68 yr (33850 days) Perihelion 2.0450 AU (305.93 Gm) Absolute magnitude 10.8 Discoverer Karl Wilhelm Reinmuth | |
Discovery site Landessternwarte Heidelberg-Königstuhl Similar 958 Asplinda, 528 Rezia, 540 Rosamunde, 441 Bathilde, 162 Laurentia | ||
999 Zachia is a main-belt asteroid that was discovered by German astronomer Karl W. Reinmuth in 1923 and named after Hungarian astronomer Franz Xaver von Zach.
Photometric observations of this asteroid collected during 1999 show a rotation period of 22.77 ± 0.03 hours with a brightness variation of 0.3 magnitude.
References
999 Zachia Wikipedia(Text) CC BY-SA