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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543441059228441 5.7171e-08  
a 2.401511664127484 1.5231e-08 AU
q 2.030852493464446 1.3566e-07 AU
i 8.948782427042177 7.4989e-06 deg
node 13.59118955074464 3.4351e-05 deg
peri 308.507789326192 4.2836e-05 deg
M 167.5397217876751 2.7573e-05 deg
tp 2456367.883133670215
(2013-Mar-16.38313367)
0.00010273 JED
period 1359.331801728444
3.72
1.2932e-05
3.541e-08
d
yr
n .2648360021756614 2.5195e-09 deg/d
Q 2.772170834790522 1.7582e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      9930 days (27.19 yr)  
   first obs. used      1987-11-22  
   last obs. used      2015-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50179  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:37:47  

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 (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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