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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08852269394782419 6.9894e-08  
a 2.270685282675121 1.6852e-08 AU
q 2.069678104345043 1.5941e-07 AU
i 5.93837143915971 6.1466e-06 deg
node 243.7542270908651 6.4738e-05 deg
peri 251.0843759554332 7.4145e-05 deg
M 177.728280642129 3.804e-05 deg
tp 2456383.496136774519
(2013-Mar-31.99613677)
0.00013028 JED
period 1249.780788733524
3.42
1.3913e-05
3.809e-08
d
yr
n .2880505151345853 3.2067e-09 deg/d
Q 2.4716924610052 1.8344e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      10747 days (29.42 yr)  
   first obs. used      1986-03-15  
   last obs. used      2015-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50434  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:51:04  

Additional Information
 Earth MOID = 1.09316 AU 
 T_jup = 3.600 
[ 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
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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