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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357109987004679 4.1735e-08  
a 2.256037310834703 6.5966e-09 au
q 1.949868234275808 9.5038e-08 au
i 6.903684708685562 4.7257e-06 deg
node 205.3126233650774 2.3973e-05 deg
peri 338.679533419457 2.6973e-05 deg
M 128.7876392211185 1.1463e-05 deg
tp 2458557.718440896423
3.9588e-05 TDB
period 1237.706989904582
n .2908604402628067 1.2757e-09 deg/d
Q 2.562206387393599 7.4918e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1986  
   data-arc span      14437 days (39.53 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45493  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:46:37  

Additional Information
 Earth MOID = .952989 au 
 Jupiter MOID = 2.40281 au 
 T_jup = 3.602 
[ show covariance matrix ]

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] (  
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] (  

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1922-Mar-06 06:10 < 00:01 Juno 0.0332981452317335 0.0332910518254705 0.0333052397697138 6.84765405331123 6.84765399995512 2423119.756795667 0.22200079474058 468.957718143661 40.4161253191809 41.2438409265159 81616.7666983449 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 16:46:49 2020-Jun-23 16:46
2040-May-25 16:03 < 00:01 Hebe 0.0124376105776568 0.0124338690924086 0.0124413520633221 8.12548173030348 8.12548166878984 2466300.168595096 0.228881188862384 186.581684820219 37.8944497281457 1.16045102000676 10017.6020320651 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 16:46:49 2020-Jun-23 16:46

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