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JPL Small-Body Database Browser
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18741 (1998 WB6)
Classification: Main-belt Asteroid          SPK-ID: 2018741
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08881886300060815 3.4874e-08  
a 2.270233507104188 6.5304e-09 au
q 2.068593948257311 7.9273e-08 au
i 5.941593032653643 3.2122e-06 deg
node 243.7111478365136 3.554e-05 deg
peri 250.8240405112217 4.1001e-05 deg
M 34.20965633635311 1.9209e-05 deg
tp 2458881.772743783278
(2020-Feb-02.27274378)
6.6766e-05 TDB
period 1249.407822685438
3.42
5.3909e-06
1.476e-08
d
yr
n .288136502320137 1.2432e-09 deg/d
Q 2.471873065951065 7.1104e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2071  
   data-arc span      12379 days (33.89 yr)  
   first obs. used      1986-03-15  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47244  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:33:33  

Additional Information
 Earth MOID = 1.09181 au 
 Jupiter MOID = 2.57659 au 
 T_jup = 3.601 
[ 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 14.0   n/a MPO358811  

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