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8163 Ishizaki (1990 UF2)
Classification: Main-belt Asteroid          SPK-ID: 2008163
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357110003205775 4.1951e-08  
a 2.256037310730664 6.6195e-09 au
q 1.94986823053086 9.5568e-08 au
i 6.903684711383233 4.7595e-06 deg
node 205.3126228468602 2.3995e-05 deg
peri 338.6795345419294 2.704e-05 deg
M 128.7876387133007 1.1521e-05 deg
tp 2458557.718442672967
(2019-Mar-15.21844267)
3.98e-05 TDB
period 1237.706989818966
3.39
5.4474e-06
1.491e-08
d
yr
n .2908604402829265 1.2801e-09 deg/d
Q 2.562206390930468 7.5178e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1961  
   data-arc span      14122 days (38.66 yr)  
   first obs. used      1980-11-29  
   last obs. used      2019-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45422  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:47:50  

Additional Information
 Earth MOID = .952989 au 
 Jupiter MOID = 2.40281 au 
 T_jup = 3.602 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO473878  
diameter diameter 4.957 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.243 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.198   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8163 Ishizaki           Discovered 1990 Oct. 27 by T. Seki at Geisei.
Named in honor of Masako Ishizaki (b. 1902), long-time Japanese amateur astronomer and pioneer in the study of meteoric dust. In particular, she studied dust collected for her at the Showa Base in Antarctica, where terrestrial contamination is low. Name proposed by the discoverer following a suggestion by S. Morikubo, I. Hasegawa and T. Sato.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19981005/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1990 UF2 = 1980 WJ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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