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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08856920567645171 6.3739e-08  
a 2.27024046186209 1.3031e-08 au
q 2.069167067460424 1.4947e-07 au
i 5.938952725265707 5.8542e-06 deg
node 243.7429203699653 5.2279e-05 deg
peri 251.2470957138293 6.3389e-05 deg
M 292.8002418502328 3.7669e-05 deg
tp 2457633.723025906243
(2016-Sep-02.22302591)
0.00013125 JED
period 1249.413563946561
3.42
1.0757e-05
2.945e-08
d
yr
n .2881351782854486 2.4808e-09 deg/d
Q 2.471313856263757 1.4185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      10863 days (29.74 yr)  
   first obs. used      1986-03-15  
   last obs. used      2015-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48896  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:40:36  

Additional Information
 Earth MOID = 1.09242 au 
 Jupiter MOID = 2.58121 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 14.0 mag 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 | Physical Parameters | Discovery Circumstances ]
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