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3641 Williams Bay (A922 WC)
Classification: Main-belt Asteroid          SPK-ID: 2003641
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1273849161831563 4.2295e-08  
a 2.991784426509523 1.8894e-08 au
q 2.610676218100535 1.2814e-07 au
i 16.10536508093253 5.3631e-06 deg
node 30.74214775340449 1.5655e-05 deg
peri 293.2164247652317 2.5638e-05 deg
M 31.65857706308162 2.2878e-05 deg
tp 2458834.280197149089
(2019-Dec-16.78019715)
0.00011943 TDB
period 1890.139563351026
5.17
1.7905e-05
4.902e-08
d
yr
n .1904621261732422 1.8043e-09 deg/d
Q 3.372892634918511 2.1301e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3016  
   data-arc span      35683 days (97.69 yr)  
   first obs. used      1922-11-24  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34864  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:05:47  

Additional Information
 Earth MOID = 1.64982 au 
 Jupiter MOID = 2.12164 au 
 T_jup = 3.184 
[ 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 11.5   n/a MPO347550  
diameter diameter 29.710 km 0.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.060   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3641 Williams Bay (A922 WC)          Discovered 1922-Nov-24 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A922 WC = 1977 LJ = 1978 RQ4 = 1982 HZ1 = 1987 FK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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