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18741 (1998 WB6)
Classification: Main-belt Asteroid          SPK-ID: 2018741
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08852663479041421 7.2141e-08  
a 2.270586729123872 1.719e-08 AU
q 2.069579326994762 1.6461e-07 AU
i 5.938818234505505 6.5922e-06 deg
node 243.7590547717182 6.7023e-05 deg
peri 251.0233414651559 7.7175e-05 deg
M 120.1818441673878 3.9863e-05 deg
tp 2456383.302273771943
(2013-Mar-31.80227377)
0.0001371 JED
period 1249.699424090349
3.42
1.4192e-05
3.886e-08
d
yr
n .288069269346141 3.2713e-09 deg/d
Q 2.471594131252982 1.8712e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      903  
   data-arc span      9938 days (27.21 yr)  
   first obs. used      1986-03-15  
   last obs. used      2013-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55254  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-22 22:37:04  

Additional Information
 Earth MOID = 1.0928 AU 
 T_jup = 3.601 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a PDS3 (MPO 5281)  

18741 (1998 WB6)          Discovered 1998-Nov-18 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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