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65689 (1990 WM4)
Classification: Main-belt Asteroid          SPK-ID: 2065689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743773868505868 3.4426e-08  
a 2.24124419142872 6.1333e-09 au
q 1.850421886033323 7.6368e-08 au
i 5.325772315906258 2.7974e-06 deg
node 118.7652184153144 4.1132e-05 deg
peri 238.1594958163749 4.189e-05 deg
M 337.5044904137404 7.8591e-06 deg
tp 2459077.081792474820
(2020-Aug-15.58179247)
2.6735e-05 TDB
period 1225.553268096439
3.36
5.0307e-06
1.377e-08
d
yr
n .2937448819006956 1.2058e-09 deg/d
Q 2.632066496824116 7.2028e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      10955 days (29.99 yr)  
   first obs. used      1990-11-16  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51331  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:01:50  

Additional Information
 Earth MOID = .852315 au 
 Jupiter MOID = 2.81212 au 
 T_jup = 3.609 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO432209  
diameter diameter 1.753 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.436   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

65689 (1990 WM4)          Discovered 1990-Nov-16 by Elst, E. W. at La Silla
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 WM4 = 2000 UN26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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