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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543441037278836 5.7192e-08  
a 2.4015116637039 1.5682e-08 AU
q 2.030852498377463 1.3576e-07 AU
i 8.948789279616502 8.3516e-06 deg
node 13.59120990390533 3.5892e-05 deg
peri 308.5077693833778 4.5854e-05 deg
M 167.539721981643 2.9278e-05 deg
tp 2456367.883133105181
(2013-Mar-16.38313311)
0.00010976 JED
period 1359.331801368801
3.72
1.3315e-05
3.645e-08
d
yr
n .26483600224573 2.594e-09 deg/d
Q 2.772170829030337 1.8102e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      9579 days (26.23 yr)  
   first obs. used      1987-11-22  
   last obs. used      2014-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50288  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 20:40:05  

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 13.5 mag n/a MPO267760  

13502 (1987 WD)          Discovered 1987-Nov-17 by Ueda, S., Kaneda, H. at Kushiro (399)
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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