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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03182422564705682 3.9964e-08  
a 2.268387125403666 1.1628e-08 AU
q 2.196197461669941 8.9744e-08 AU
i 4.42667793173515 6.2184e-06 deg
node 67.08801302772765 6.3657e-05 deg
peri 69.20509480823434 0.00013917 deg
M 33.5598973743495 0.0001222 deg
tp 2456884.169843925738
(2014-Aug-14.66984393)
0.00042372 JED
period 1247.883916913977
3.42
9.595e-06
2.627e-08
d
yr
n .2884883722920973 2.2182e-09 deg/d
Q 2.340576789137391 1.1998e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1229  
   data-arc span      9316 days (25.51 yr)  
   first obs. used      1989-11-20  
   last obs. used      2015-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49492  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:03:13  

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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