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85532 (1997 WD21)
Classification: Main-belt Asteroid          SPK-ID: 2085532
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .150182783047541 8.5374e-08  
a 2.689460809006706 2.6145e-08 AU
q 2.285550099812788 2.3164e-07 AU
i 13.46554594268222 8.1792e-06 deg
node 242.7393485299733 3.833e-05 deg
peri 159.6709491918069 4.9786e-05 deg
M 333.0067631097797 3.0822e-05 deg
tp 2457121.294934398187
(2015-Apr-08.79493440)
0.00013851 JED
period 1611.002658191857
4.41
2.3491e-05
6.431e-08
d
yr
n .2234633184305566 3.2585e-09 deg/d
Q 3.093371518200624 3.0071e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      6201 days (16.98 yr)  
   first obs. used      1997-11-05  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 15:28:11  

Additional Information
 Earth MOID = 1.29956 AU 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO309783  

85532 (1997 WD21)          Discovered 1997-Nov-23 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905)
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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