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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743773861888729 3.8074e-08  
a 2.241244192672355 8.212e-09 au
q 1.85042188854316 8.6637e-08 au
i 5.325776262811964 3.6937e-06 deg
node 118.7652178528617 4.1673e-05 deg
peri 238.1594980688673 4.2842e-05 deg
M 337.5044878869784 1.2805e-05 deg
tp 2459077.081801140454
(2020-Aug-15.58180114)
4.3803e-05 TDB
period 1225.553269116503
3.36
6.7357e-06
1.844e-08
d
yr
n .293744881656203 1.6144e-09 deg/d
Q 2.632066496801551 9.6439e-09 au
  Orbit Determination Parameters
   # obs. used (total)      928  
   data-arc span      10853 days (29.71 yr)  
   first obs. used      1990-11-16  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56336  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 05:48:15  

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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