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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03182410054256257 6.2613e-08  
a 2.268387155175364 1.6298e-08 AU
q 2.196197774279606 1.5012e-07 AU
i 4.426676590481226 6.6703e-06 deg
node 67.08798550015513 6.7967e-05 deg
peri 69.2049964675207 0.00014812 deg
M 33.55999958301353 0.0001278 deg
tp 2456884.169487345138
(2014-Aug-14.66948735)
0.0004434 JED
period 1247.883941480963
3.42
1.3449e-05
3.682e-08
d
yr
n .2884883666126509 3.1091e-09 deg/d
Q 2.340576536071123 1.6817e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1111  
   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      .49745  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:22:32  

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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