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13502 (1987 WD)
Classification: Main-belt Asteroid          SPK-ID: 2013502
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543441065717431 5.7109e-08  
a 2.401511663944359 1.4831e-08 AU
q 2.030852491751247 1.3555e-07 AU
i 8.948787139052502 6.8189e-06 deg
node 13.59120740502241 3.2086e-05 deg
peri 308.5077720816483 3.9501e-05 deg
M 167.5397215358198 2.6203e-05 deg
tp 2456367.883134693560
(2013-Mar-16.38313469)
9.7016e-05 JED
period 1359.331801572962
3.72
1.2592e-05
3.448e-08
d
yr
n .2648360022059537 2.4532e-09 deg/d
Q 2.772170836137471 1.712e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1168  
   data-arc span      10068 days (27.56 yr)  
   first obs. used      1987-11-22  
   last obs. used      2015-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47839  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:38:54  

Additional Information
 Earth MOID = 1.03384 AU 
 T_jup = 3.493 
[ 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 13.6 mag n/a MPO319253  

13502 (1987 WD)          Discovered 1987-Nov-17 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 WD = 1983 TJ = 1997 GZ42 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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