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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08846620489938034 3.3561e-08  
a 2.270673328014576 6.0627e-09 au
q 2.069795476118881 7.5645e-08 au
i 5.940408759169692 2.9313e-06 deg
node 243.7024850159319 3.3904e-05 deg
peri 250.9299769841405 3.8396e-05 deg
M 148.2316739084755 1.7027e-05 deg
tp 2458881.901012979176
(2020-Feb-02.40101298)
5.9375e-05 TDB
period 1249.770919013444
3.42
5.0054e-06
1.37e-08
d
yr
n .2880527899338385 1.1537e-09 deg/d
Q 2.471551179910271 6.5991e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2480  
   data-arc span      12891 days (35.29 yr)  
   first obs. used      1986-03-15  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44917  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:40:12  

Additional Information
 Earth MOID = 1.0936 au 
 Jupiter MOID = 2.57517 au 
 T_jup = 3.600 
[ 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 14.06   n/a E2021B10  

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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