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27721 (1989 WJ)
Classification: Main-belt Asteroid          SPK-ID: 2027721
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320512888617211 7.1636e-08  
a 2.600669196447351 2.1631e-08 AU
q 2.257247477153502 1.8903e-07 AU
i 15.05083787810393 8.3955e-06 deg
node 66.87292088773094 2.3406e-05 deg
peri 8.424481742955919 3.793e-05 deg
M 342.534495096129 2.6215e-05 deg
tp 2457074.819835837191
(2015-Feb-21.31983584)
0.00011146 JED
period 1531.884766495289
4.19
1.9112e-05
5.233e-08
d
yr
n .2350046216750515 2.9319e-09 deg/d
Q 2.9440909157412 2.4487e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      831  
   data-arc span      9221 days (25.25 yr)  
   first obs. used      1989-11-20  
   last obs. used      2015-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48192  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:26:54  

Additional Information
 Earth MOID = 1.27251 AU 
 T_jup = 3.354 
[ 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 14.1 mag n/a MPO319428  

27721 (1989 WJ)          Discovered 1989-Nov-20 by Oshima, Y. at Gekko
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WJ = 1999 CP127 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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