astro.wikisort.org - Asteroid

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.

999 Zachia

Discovery
Discovered by	K. Reinmuth
Discovery site	Heidelberg
Discovery date	9 August 1923
Designations
MPC designation	(999) Zachia
Alternative designations	1923 NW
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	92.68 yr (33850 days)
Aphelion	3.1787 AU (475.53 Gm)
Perihelion	2.0450 AU (305.93 Gm)
Semi-major axis	2.6118 AU (390.72 Gm)
Eccentricity	0.21704
Orbital period (sidereal)	4.22 yr (1541.8 d)
Mean anomaly	352.050°
Mean motion	0° 14m 0.6s / day
Inclination	9.7603°
Longitude of ascending node	214.972°
Argument of perihelion	128.034°
Physical characteristics
Mean radius	8.95 km
Synodic rotation period	22.77 h (0.949 d)
Geometric albedo	0.1994±0.051
Absolute magnitude (H)	10.8

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.[2]

References

External links

• Lightcurve plot of 999 Zachia, Palmer Divide Observatory, B. D. Warner (1999)
• Asteroid Lightcurve Database (LCDB), query form (info)
• 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 diagram · Orbital elements · Physical parameters

На других языках

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[de] (999) Zachia

(999) Zachia ist ein Asteroid des Hauptgürtels, der am 9. August 1923 von dem deutschen Astronomen Karl Wilhelm Reinmuth an der Landessternwarte Heidelberg-Königstuhl der Universität Heidelberg entdeckt wurde.

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- [en] 999 Zachia

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[es] (999) Zachia

(999) Zachia es un asteroide perteneciente al cinturón de asteroides descubierto el 9 de agosto de 1923 por Karl Wilhelm Reinmuth desde el observatorio de Heidelberg-Königstuhl, Alemania. Está nombrado en honor del astrónomo y matemático alemán Franz Xaver von Zach (1754-1832).[2]

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[ru] (999) Цахия

(999) Цахия (нем. Zachia) — астероид главного пояса, который был открыт 9 августа 1923 года немецким астрономом Карлом Рейнмутом в обсерватории Хайдельберг и назван в честь австрийского астронома Франца фон Цаха[1].

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