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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2208517905648899 7.8542e-08  
a 3.100157754475569 4.5363e-08 AU
q 2.415482363366011 2.4168e-07 AU
i 2.695133513333465 8.3365e-06 deg
node 56.32703767176562 0.00016156 deg
peri 312.5259620728919 0.00016254 deg
M 337.3710747671783 2.4285e-05 deg
tp 2456925.824374133246
(2014-Sep-25.32437413)
0.00013647 JED
period 1993.765688108322
5.46
4.376e-05
1.198e-07
d
yr
n .1805628425382156 3.9631e-09 deg/d
Q 3.784833145585126 5.5381e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      624  
   data-arc span      9744 days (26.68 yr)  
   first obs. used      1987-10-27  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62603  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:33:02  

Additional Information
 Earth MOID = 1.41452 AU 
 T_jup = 3.182 
[ 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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