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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743113965829693 3.4011e-08  
a 2.241340709229792 6.0611e-09 au
q 1.850649479985684 7.5359e-08 au
i 5.325769649014579 2.6756e-06 deg
node 118.7651698299891 4.0287e-05 deg
peri 238.2425088322626 4.1066e-05 deg
M 93.76357208634217 7.7615e-06 deg
tp 2459077.278679953320
(2020-Aug-15.77867995)
2.6497e-05 TDB
period 1225.632435494044
3.36
4.9716e-06
1.361e-08
d
yr
n .2937259080083716 1.1915e-09 deg/d
Q 2.6320319384739 7.1176e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1298  
   data-arc span      11045 days (30.24 yr)  
   first obs. used      1990-11-16  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51017  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 22:29:25  

Additional Information
 Earth MOID = .851756 au 
 Jupiter MOID = 2.81315 au 
 T_jup = 3.608 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.71   n/a E2021B10  
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

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