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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2206810389300852 7.7398e-08  
a 3.099473065799591 2.8621e-08 AU
q 2.415478129503121 2.4044e-07 AU
i 2.695202167941281 7.8784e-06 deg
node 56.32420200733781 0.00015012 deg
peri 312.5330650427892 0.0001509 deg
M 13.485126316186 1.4434e-05 deg
tp 2456925.840900900550
(2014-Sep-25.34090090)
7.965e-05 JED
period 1993.10522167981
5.46
2.7607e-05
7.558e-08
d
yr
n .1806226766575767 2.5018e-09 deg/d
Q 3.783468002096062 3.4937e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      778  
   data-arc span      9984 days (27.33 yr)  
   first obs. used      1987-10-27  
   last obs. used      2015-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58879  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:50:12  

Additional Information
 Earth MOID = 1.41591 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 13.9 mag n/a MPO266035  

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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