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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1548909113372383 5.7356e-08  
a 2.399722487337042 1.4798e-08 au
q 2.028027284316943 1.3623e-07 au
i 8.956448817817378 6.8253e-06 deg
node 13.5533413760906 3.2044e-05 deg
peri 308.8622798378398 3.9409e-05 deg
M 273.158627750889 2.6446e-05 deg
tp 2457728.039842152438
(2016-Dec-05.53984215)
0.00010092 JED
period 1357.812988452459
3.72
1.256e-05
3.439e-08
d
yr
n .2651322406411085 2.4525e-09 deg/d
Q 2.771417690357141 1.7091e-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 = 1.02834 au 
 Jupiter MOID = 2.57966 au 
 T_jup = 3.494 
[ 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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