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18347 (1989 WU)
Classification: Main-belt Asteroid          SPK-ID: 2018347
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1554600374861664 3.3035e-08  
a 2.231885984795742 6.1056e-09 au
q 1.884916905934547 7.3541e-08 au
i 4.959816843931563 3.6979e-06 deg
node 270.1802140173432 4.4209e-05 deg
peri 174.9461679260627 4.6695e-05 deg
M 42.33382917397782 1.2933e-05 deg
tp 2458857.284017521723
(2020-Jan-08.78401752)
4.3858e-05 TDB
period 1217.885428702766
3.33
4.9975e-06
1.368e-08
d
yr
n .2955943075724742 1.213e-09 deg/d
Q 2.578855063656937 7.0548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      11111 days (30.42 yr)  
   first obs. used      1989-11-20  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44925  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:47:59  

Additional Information
 Earth MOID = .90119 au 
 Jupiter MOID = 2.62511 au 
 T_jup = 3.620 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO412322  
diameter diameter 3.988 km 0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.255   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18347 (1989 WU)          Discovered 1989-Nov-20 by Oohira at Oohira
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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