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JPL Small-Body Database Browser
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(2019 WE)
Classification: Apollo [NEO]          SPK-ID: 3893231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .461371321889102 0.00024616  
a 1.726616416094683 0.00075091 au
q .9300051178056554 2.0565e-05 au
i .4361539951502502 0.00017452 deg
node 240.0773912688103 0.0005283 deg
peri 215.2221176714581 0.00040101 deg
M 70.8406468942153 0.044938 deg
tp 2458837.430686433099
(2019-Dec-19.93068643)
0.0029368 TDB
period 828.6902429299809
2.27
0.5406
0.00148
d
yr
n .434420464185938 0.00028339 deg/d
Q 2.523227714383711 0.0010974 au
  Orbit Determination Parameters
   # obs. used (total)      50  
   data-arc span      4 days  
   first obs. used      2019-11-17  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .50403  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-30 06:13:49  

Additional Information
 Earth MOID = 4.2851E-5 au 
 Jupiter MOID = 2.68497 au 
 T_jup = 4.036 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458807.5 (2019-Nov-20.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4657673114752063 0.0002423  
q .9307330226622115 2.1349e-05 au
tp 2458837.166555835069
(2019-Dec-19.66655583)
0.002517 TDB
node 240.1055633322229 0.00048757 deg
peri 214.8722811817145 0.00023591 deg
i .4341977804156172 0.0001762 deg
  Orbit Determination Parameters
   # obs. used (total)      50  
   data-arc span      4 days  
   first obs. used      2019-11-17  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .50403  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-30 06:13:49  

Additional Information
 Jupiter MOID = 2.68497 au 
 T_jup = 4.036 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.871155855697094E-8 -5.171333733532763E-9 -6.093156997909712E-7 1.177949728050656E-7 3.877217040504285E-8 4.266733279927912E-8
q -5.171333733532763E-9 4.557642996267037E-10 5.361269428865702E-8 -1.036614055625675E-8 -3.503932409896743E-9 -3.759334098567145E-9
tp -6.093156997909712E-7 5.361269428865702E-8 6.335169895199776E-6 -1.224328044305756E-6 -3.840590029315653E-7 -4.425633760204532E-7
node 1.177949728050656E-7 -1.036614055625675E-8 -1.224328044305756E-6 2.377261227597069E-7 7.376946002658319E-8 8.543527903041798E-8
peri 3.877217040504285E-8 -3.503932409896743E-9 -3.840590029315653E-7 7.376946002658319E-8 5.565374885801676E-8 2.869223842742166E-8
i 4.266733279927912E-8 -3.759334098567145E-9 -4.425633760204532E-7 8.543527903041798E-8 2.869223842742166E-8 3.10457796320955E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.8   .31418 E2019-WI7 autocmod 2.8

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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