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85805 (1998 WS6)
Classification: Main-belt Asteroid          SPK-ID: 2085805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1436550767769792 3.8776e-08  
a 2.387270347815022 9.9532e-09 au
q 2.044326842712249 9.4625e-08 au
i .4687916862995788 3.8621e-06 deg
node 158.4550164579603 0.00051871 deg
peri 230.5421775036344 0.00051894 deg
M 323.3714272986871 1.8568e-05 deg
tp 2459137.578179363042
(2020-Oct-15.07817936)
7.0043e-05 TDB
period 1347.258190295972
3.69
8.4256e-06
2.307e-08
d
yr
n .2672093609027632 1.6711e-09 deg/d
Q 2.730213852917795 1.1383e-08 au
  Orbit Determination Parameters
   # obs. used (total)      653  
   data-arc span      8894 days (24.35 yr)  
   first obs. used      1996-03-26  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55939  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:57:17  

Additional Information
 Earth MOID = 1.04929 au 
 Jupiter MOID = 2.70364 au 
 T_jup = 3.520 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457066.5 (2015-Feb-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1453371384943672 3.8903e-08  
q 2.039812717306377 9.5075e-08 au
tp 2456442.995076125485
(2013-May-30.49507613)
5.9642e-05 TDB
node 158.4493739303795 0.0005196 deg
peri 230.527802233038 0.00051983 deg
i .4682850002778886 3.8616e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      653  
   data-arc span      8894 days (24.35 yr)  
   first obs. used      1996-03-26  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55939  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:57:17  

Additional Information
 Jupiter MOID = 2.70364 au 
 T_jup = 3.520 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.513428669162515E-15 -3.684768061527961E-15 -1.888393184095425E-13 -4.973573631398816E-15 -4.252984114409574E-14 1.210680223406828E-16
q -3.684768061527961E-15 9.039174278326681E-15 6.850057589596095E-13 1.282341653997305E-14 1.636067281346923E-13 -2.702264651667603E-16
tp -1.888393184095425E-13 6.850057589596095E-13 3.557161959946637E-9 -2.416280849723149E-11 9.413749839826057E-10 4.567531829093923E-14
node -4.973573631398816E-15 1.282341653997305E-14 -2.416280849723149E-11 2.699874061505569E-7 -2.699834887945654E-7 2.123006236879006E-10
peri -4.252984114409574E-14 1.636067281346923E-13 9.413749839826057E-10 -2.699834887945654E-7 2.702246727827481E-7 -2.122812776775936E-10
i 1.210680223406828E-16 -2.702264651667603E-16 4.567531829093923E-14 2.123006236879006E-10 -2.122812776775936E-10 1.491206934719261E-11

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 16.1   n/a MPO436375  
diameter diameter 3.922 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.038   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85805 (1998 WS6)          Discovered 1998-Nov-24 by Cooney Jr., W. R., Motl, P. M. at Baton Rouge
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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