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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0318241224656093 5.8587e-08  
a 2.268387149707015 1.5385e-08 AU
q 2.196197719255324 1.396e-07 AU
i 4.426676974657663 6.5499e-06 deg
node 67.0879866246792 6.7742e-05 deg
peri 69.20501494869656 0.00014725 deg
M 33.55998428196998 0.00012731 deg
tp 2456884.169540804475
(2014-Aug-14.66954080)
0.00044166 JED
period 1247.883936968595
3.42
1.2696e-05
3.476e-08
d
yr
n .2884883676558295 2.935e-09 deg/d
Q 2.340576580158706 1.5875e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1140  
   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      .50054  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:15:40  

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
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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