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9031 (1989 WG4)
Classification: Main-belt Asteroid          SPK-ID: 2009031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0899672050892257 7.1678e-08  
a 2.194569390035995 1.7432e-08 AU
q 1.99713011564009 1.5175e-07 AU
i 5.861426688286268 7.114e-06 deg
node 103.6056768748259 7.9849e-05 deg
peri 321.0951701842579 9.4929e-05 deg
M 181.9670392533536 5.0427e-05 deg
tp 2457387.746336961804
(2015-Dec-31.24633696)
0.00016729 JED
period 1187.469333878567
3.25
1.4149e-05
3.874e-08
d
yr
n .303165723719493 3.6122e-09 deg/d
Q 2.3920086644319 1.9e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      803  
   data-arc span      8870 days (24.28 yr)  
   first obs. used      1989-11-29  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51824  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:53:52  

Additional Information
 Earth MOID = 1.01382 AU 
 T_jup = 3.658 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO263430  

9031 (1989 WG4)          Discovered 1989-Nov-29 by Mrkos, A. at Klet (046)
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 WG4 = 1994 EM3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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