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4438 Sykes (1983 WR)
Classification: Main-belt Asteroid          SPK-ID: 2004438
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2533742897416425 2.4714e-08  
a 3.162504875422603 1.6949e-08 au
q 2.36120744880792 8.3326e-08 au
i 13.3073114667426 1.3255e-06 deg
node 56.86292350730268 3.3434e-06 deg
peri 291.9477832897488 3.6315e-06 deg
M 252.1100812183003 4.0568e-06 deg
tp 2459816.135418907897
(2022-Aug-24.63541891)
2.6649e-05 TDB
period 2054.211860658437
5.62
1.6514e-05
4.521e-08
d
yr
n .1752496940041078 1.4088e-09 deg/d
Q 3.963802302037287 2.1243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2420  
   data-arc span      24225 days (66.32 yr)  
   first obs. used      1954-11-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4537  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:37:41  

Additional Information
 Earth MOID = 1.39317 au 
 Jupiter MOID = 1.71437 au 
 T_jup = 3.113 
[ 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 11.72   n/a MPCxxxxx  
diameter diameter 26.693 km 0.271 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.062   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4438 Sykes (1983 WR)          Discovered 1983-Nov-29 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1983 WR = 1971 TA = 1977 TN5 = 1987 KB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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