Astronomy:999 Zachia

From HandWiki
999 Zachia
Discovery
Discovered byK. Reinmuth
Discovery siteHeidelberg
Discovery date9 August 1923
Designations
(999) Zachia
1923 NW
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc92.68 yr (33850 days)
|{{{apsis}}}|helion}}3.1787 astronomical unit|AU (475.53 Gm)
|{{{apsis}}}|helion}}2.0450 AU (305.93 Gm)
2.6118 AU (390.72 Gm)
Eccentricity0.21704
Orbital period4.22 yr (1541.8 d)
Mean anomaly352.050°
Mean motion0° 14m 0.6s / day
Inclination9.7603°
Longitude of ascending node214.972°
128.034°
Physical characteristics
Mean radius8.95 km
Rotation period22.77 h (0.949 d)
Geometric albedo0.1994±0.051
Absolute magnitude (H)10.8


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.[2]

References

  1. "999 Zachia (1923 NW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=999;cad=1. 
  2. Warner, B. (March 2000), "Asteroid Photometry at the Palmer Divide Observatory", The Minor Planet Bulletin 27: 4–6, Bibcode2000MPBu...27....4W. 

External links


vec:Lista de asteroidi#999 Zachia