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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03182412287734838 5.86e-08  
a 2.268387149930324 1.5408e-08 AU
q 2.196197718537543 1.3962e-07 AU
i 4.426676993700192 6.5499e-06 deg
node 67.08798571586696 6.7927e-05 deg
peri 69.20501538373722 0.00014734 deg
M 33.55998457897022 0.00012731 deg
tp 2456884.169539757792
(2014-Aug-14.66953976)
0.00044167 JED
period 1247.883937152865
3.42
1.2714e-05
3.481e-08
d
yr
n .2884883676132295 2.9393e-09 deg/d
Q 2.340576581323105 1.5898e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1131  
   data-arc span      9200 days (25.19 yr)  
   first obs. used      1989-11-20  
   last obs. used      2015-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50239  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:24:31  

Additional Information
 Earth MOID = 1.21489 AU 
 T_jup = 3.610 
[ 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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