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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2206810451930266 7.8341e-08  
a 3.099473047814477 4.2616e-08 AU
q 2.415478096075162 2.416e-07 AU
i 2.69520697810425 8.2841e-06 deg
node 56.32437033404391 0.0001612 deg
peri 312.5328923097367 0.00016213 deg
M 13.48513588888068 2.3209e-05 deg
tp 2456925.840848552080
(2014-Sep-25.34084855)
0.00012744 JED
period 1993.105204331913
5.46
4.1106e-05
1.125e-07
d
yr
n .1806226782297082 3.7252e-09 deg/d
Q 3.783467999553791 5.202e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      628  
   data-arc span      9811 days (26.86 yr)  
   first obs. used      1987-10-27  
   last obs. used      2014-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62486  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:03:40  

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 (399)
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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