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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543441049888826 5.7167e-08  
a 2.401511662552736 1.4909e-08 AU
q 2.03085249437567 1.3564e-07 AU
i 8.948786748128823 6.9017e-06 deg
node 13.5912056149675 3.2674e-05 deg
peri 308.5077778655596 4.019e-05 deg
M 167.5397184924505 2.6395e-05 deg
tp 2456367.883146734965
(2013-Mar-16.38314673)
9.7829e-05 JED
period 1359.331800391408
3.72
1.2659e-05
3.466e-08
d
yr
n .2648360024361536 2.4663e-09 deg/d
Q 2.772170830729801 1.7211e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1131  
   data-arc span      9985 days (27.34 yr)  
   first obs. used      1987-11-22  
   last obs. used      2015-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47521  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:47:03  

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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