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441858 (2009 WS169)
Classification: Main-belt Asteroid          SPK-ID: 2441858
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06005093224434913 1.0326e-07  
a 2.238984276600488 2.6618e-08 au
q 2.104531183510189 2.44e-07 au
i 6.550956740574941 8.9832e-06 deg
node 239.1772550450621 8.0248e-05 deg
peri 262.6362502945515 0.00011856 deg
M 326.627812724864 9.5447e-05 deg
tp 2459113.937635050037
(2020-Sep-21.43763505)
0.00032508 TDB
period 1223.700091376371
3.35
2.1821e-05
5.974e-08
d
yr
n .2941897304224974 5.2461e-09 deg/d
Q 2.373437369690787 2.8216e-08 au
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      5712 days (15.64 yr)  
   first obs. used      2004-03-16  
   last obs. used      2019-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56002  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-05 02:10:41  

Additional Information
 Earth MOID = 1.12908 au 
 Jupiter MOID = 2.65033 au 
 T_jup = 3.625 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457305.5 (2015-Oct-10.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05944499431271507 1.0335e-07  
q 2.106000672009489 2.4405e-07 au
tp 2457891.109167641293
(2017-May-17.60916764)
0.00032177 TDB
node 239.1957467942755 8.0296e-05 deg
peri 262.8535933286558 0.00011919 deg
i 6.548266907915679 8.9825e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      5712 days (15.64 yr)  
   first obs. used      2004-03-16  
   last obs. used      2019-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56002  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-05 02:10:41  

Additional Information
 Jupiter MOID = 2.65033 au 
 T_jup = 3.625 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.068132100846752E-14 -2.511945434856126E-14 -5.644447757187966E-12 -1.257486422466241E-13 -8.38133631912963E-13 2.121660918942622E-14
q -2.511945434856126E-14 5.956160336144892E-14 1.467380051614016E-11 3.02643051295389E-13 2.305389772347704E-12 -4.84457838720819E-14
tp -5.644447757187966E-12 1.467380051614016E-11 1.035375061304698E-7 4.740297571460709E-10 2.833298124561685E-8 -2.755173122686489E-12
node -1.257486422466241E-13 3.02643051295389E-13 4.740297571460709E-10 6.447437131201484E-9 -6.279144715604417E-9 -1.715293979943984E-10
peri -8.38133631912963E-13 2.305389772347704E-12 2.833298124561685E-8 -6.279144715604417E-9 1.42066114758867E-8 1.708587660286697E-10
i 2.121660918942622E-14 -4.84457838720819E-14 -2.755173122686489E-12 -1.715293979943984E-10 1.708587660286697E-10 8.068596542502202E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.2   n/a MPO241977  

441858 (2009 WS169)          Discovered 2009-Oct-24 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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