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14640 (1998 WF4)
Classification: Main-belt Asteroid          SPK-ID: 2014640
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .220460609568872 7.376e-08  
a 3.099902697181384 2.7074e-08 au
q 2.416496258956585 2.2714e-07 au
i 2.695052958438673 7.4163e-06 deg
node 56.31879279566752 0.00014347 deg
peri 312.6156634830305 0.00014425 deg
M 85.68353936888424 1.4418e-05 deg
tp 2456926.022724932873
(2014-Sep-25.52272493)
7.8038e-05 JED
period 1993.519645457078
5.46
2.6117e-05
7.15e-08
d
yr
n .1805851278267482 2.3658e-09 deg/d
Q 3.783309135406182 3.3043e-08 au
  Orbit Determination Parameters
   # obs. used (total)      841  
   data-arc span      10279 days (28.14 yr)  
   first obs. used      1987-10-27  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58447  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:28:10  

Additional Information
 Earth MOID = 1.41515 au 
 Jupiter MOID = 1.67304 au 
 T_jup = 3.183 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO358773  

14640 (1998 WF4)          Discovered 1998-Nov-18 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000418/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WF4 = 1987 UV6 = 1995 GA9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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