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8840 (1989 WT)
Classification: Main-belt Asteroid          SPK-ID: 2008840
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03206950352560702 6.4164e-08  
a 2.268953969005273 1.5835e-08 AU
q 2.196189741696819 1.5306e-07 AU
i 4.427253530214503 6.7523e-06 deg
node 67.10831677441747 7.0327e-05 deg
peri 69.68538261261288 0.00015007 deg
M 335.4012991640005 0.00012932 deg
tp 2456885.799527364024
(2014-Aug-16.29952736)
0.00044819 JED
period 1248.351693684115
3.42
1.3068e-05
3.578e-08
d
yr
n .2883802712179402 3.0189e-09 deg/d
Q 2.341718196313728 1.6343e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1110  
   data-arc span      8905 days (24.38 yr)  
   first obs. used      1989-11-20  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51777  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:55:23  

Additional Information
 Earth MOID = 1.21453 AU 
 T_jup = 3.609 
[ 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 13.7 mag n/a MPO267743  

8840 (1989 WT)          Discovered 1989-Nov-20 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 19980610/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WT = 1984 GX = 1996 VT7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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