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8428 Okiko (1997 VJ8)
Classification: Main-belt Asteroid          SPK-ID: 2008428
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .183337189290479 3.0437e-08  
a 2.377355717679916 6.9259e-09 au
q 1.94149800245683 7.3991e-08 au
i 1.576828176623728 3.9464e-06 deg
node 202.486082188404 0.00012082 deg
peri 239.615002691034 0.00012131 deg
M 30.22664550494749 1.0473e-05 deg
tp 2458888.084257779041
(2020-Feb-08.58425778)
3.8843e-05 TDB
period 1338.873914835218
3.67
5.8507e-06
1.602e-08
d
yr
n .2688826752176339 1.175e-09 deg/d
Q 2.813213432903001 8.1956e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1973  
   data-arc span      12119 days (33.18 yr)  
   first obs. used      1986-11-30  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47677  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:54:12  

Additional Information
 Earth MOID = .957961 au 
 Jupiter MOID = 2.41969 au 
 T_jup = 3.517 
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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 MPO412242  
diameter diameter 3.228 km 0.480 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.467   0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8428 Okiko           Discovered 1997 Nov. 3 by T. Seki at Geisei.
Kochi native Okiko Seki (b. 1941), wife of the discoverer, has many hobbies, including yoga, dance and handicraft.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1997 VJ8 = 1986 WG8 = 1991 CB5 = 1993 SA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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