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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08852269777031899 7.0915e-08  
a 2.270685284155045 1.7443e-08 AU
q 2.069678097014277 1.6107e-07 AU
i 5.938371507101813 6.2273e-06 deg
node 243.7542275427727 6.5361e-05 deg
peri 251.0843751240089 7.4711e-05 deg
M 177.7282801915738 3.8068e-05 deg
tp 2456383.496137735472
(2013-Mar-31.99613774)
0.00013032 JED
period 1249.780789955345
3.42
1.4401e-05
3.943e-08
d
yr
n .2880505148529791 3.3192e-09 deg/d
Q 2.471692471295813 1.8987e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      902  
   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      .52138  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:12:12  

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 (399)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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