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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .15546245961613 1.6848e-08  
a 2.231560100286033 5.7189e-09 au
q 1.884636278314348 3.8624e-08 au
i 4.959764373164181 7.7548e-07 deg
node 270.1768387531404 9.5294e-06 deg
peri 174.8928839560143 1.0247e-05 deg
M 101.513066760732 7.2652e-06 deg
tp 2458857.154977374066
(2020-Jan-08.65497737)
2.4326e-05 TDB
period 1217.618697666514
3.33
4.6807e-06
1.282e-08
d
yr
n .2956590603363076 1.1365e-09 deg/d
Q 2.578483922257717 6.608e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1868  
   data-arc span      11349 days (31.07 yr)  
   first obs. used      1989-11-20  
   last obs. used      2020-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45143  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 01:53:06  

Additional Information
 Earth MOID = .900571 au 
 Jupiter MOID = 2.62567 au 
 T_jup = 3.621 
[ 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 14.25   n/a E2021B10  
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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