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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457487.5 (2016-Apr-09.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .174873055999422 3.442e-08  
q 1.848937238544298 7.6408e-08 au
tp 2457852.528858567799
(2017-Apr-09.02885857)
2.7425e-05 TDB
node 118.7884216565902 4.1165e-05 deg
peri 238.4072630570928 4.1918e-05 deg
i 5.324228847272526 2.7963e-06 deg
  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
 Jupiter MOID = 2.81212 au 
 T_jup = 3.609 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.184752595243141E-15 -2.624399708249332E-15 2.016011371139023E-13 9.568346592995149E-16 5.70131443888902E-14 -2.313096809194457E-15
q -2.624399708249332E-15 5.83813439045887E-15 -4.872305160941758E-13 -1.784859750713375E-15 -1.404063637582581E-13 5.188636460922958E-15
tp 2.016011371139023E-13 -4.872305160941758E-13 7.5211043701241E-10 6.449086429780647E-12 2.32566021210548E-10 -1.098078683897923E-12
node 9.568346592995149E-16 -1.784859750713375E-15 6.449086429780647E-12 1.694584306296913E-9 -1.685221831143014E-9 2.546138460479046E-11
peri 5.70131443888902E-14 -1.404063637582581E-13 2.32566021210548E-10 -1.685221831143014E-9 1.757079460746724E-9 -2.567427850227429E-11
i -2.313096809194457E-15 5.188636460922958E-15 -1.098078683897923E-12 2.546138460479046E-11 -2.567427850227429E-11 7.81925145745985E-12

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

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