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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

1. "999 Zachia (1923 NW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.
2. Warner, B. (March 2000), "Asteroid Photometry at the Palmer Divide Observatory", The Minor Planet Bulletin, 27: 4–6, Bibcode:2000MPBu...27....4W.

External links

• Lightcurve plot of 999 Zachia, Palmer Divide Observatory, B. D. Warner (1999)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 999 Zachia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 999 Zachia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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• Minor planet object articles (numbered)
• Background asteroids
• Discoveries by Karl Wilhelm Reinmuth
• Named minor planets
• Astronomical objects discovered in 1923
• Main-belt-asteroid stubs