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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320513237312752 7.9685e-08  
a 2.600669216121509 2.8924e-08 AU
q 2.257247403545486 2.0318e-07 AU
i 15.05083841846569 8.5497e-06 deg
node 66.87292689003635 2.8593e-05 deg
peri 8.42448128094388 4.161e-05 deg
M 342.5344810331882 2.9705e-05 deg
tp 2457074.819896521665
(2015-Feb-21.31989652)
0.00012671 JED
period 1531.884783878436
4.19
2.5556e-05
6.997e-08
d
yr
n .2350046190083236 3.9205e-09 deg/d
Q 2.944091028697532 3.2743e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      9050 days (24.78 yr)  
   first obs. used      1989-11-20  
   last obs. used      2014-08-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51443  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:23:19  

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 14.0 mag n/a MPO263584  

27721 (1989 WJ)          Discovered 1989-Nov-20 by Oshima, Y. at Gekko (888)
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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