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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1273647949295952 1.6943e-08  
a 2.992163296432761 1.4641e-08 au
q 2.611067031786741 4.8869e-08 au
i 16.10431376912589 1.1834e-06 deg
node 30.74233270741624 3.0885e-06 deg
peri 293.2916756829765 1.0502e-05 deg
M 69.68366374716813 8.8919e-06 deg
tp 2458834.564250263491
(2019-Dec-17.06425026)
4.5684e-05 TDB
period 1890.498616478053
5.18
1.3875e-05
3.799e-08
d
yr
n .190425952636067 1.3976e-09 deg/d
Q 3.373259561078781 1.6505e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3563  
   data-arc span      35911 days (98.32 yr)  
   first obs. used      1922-11-24  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .33855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:07:41  

Additional Information
 Earth MOID = 1.64838 au 
 Jupiter MOID = 2.12066 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 11.63   n/a E2021B10  
diameter diameter 29.710 km 0.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.03523 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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