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(2018 WD)
Classification: Apollo [NEO]          SPK-ID: 3836267
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5176960895715679 1.6244e-05  
a 1.907056604621595 6.3096e-05 au
q .9197808578173635 6.3264e-07 au
i 16.76908123348836 0.00035235 deg
node 61.30299787814621 1.0391e-05 deg
peri 40.33319646740563 0.00014141 deg
M 195.8193550105062 0.0095977 deg
tp 2459439.195580546312
(2021-Aug-12.69558055)
0.047417 TDB
period 961.9307379793679
2.63
0.047739
0.0001307
d
yr
n .3742473192573263 1.8573e-05 deg/d
Q 2.894332351425826 9.576e-05 au
  Orbit Determination Parameters
   # obs. used (total)      72  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      9 days  
   first obs. used      2018-11-16  
   last obs. used      2018-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .30884  
   source      ORB  
   producer      Giorgini  
   solution date      2019-Jan-04 16:49:55  

Additional Information
 Earth MOID = .0110193 au 
 Jupiter MOID = 2.41853 au 
 T_jup = 3.720 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458441.5 (2018-Nov-19.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5191172654610395 1.6308e-05  
q .91936005838926 9.8843e-07 au
tp 2458476.886860201267
(2018-Dec-24.38686020)
0.00027085 TDB
node 61.36353808887795 1.2269e-05 deg
peri 39.9918148969407 0.00013422 deg
i 16.80863046863909 0.00035541 deg
  Orbit Determination Parameters
   # obs. used (total)      72  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      9 days  
   first obs. used      2018-11-16  
   last obs. used      2018-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .30884  
   source      ORB  
   producer      Giorgini  
   solution date      2019-Jan-04 16:49:55  

Additional Information
 Jupiter MOID = 2.41853 au 
 T_jup = 3.720 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.659627569246121E-10 -1.535529932639583E-11 -4.342950519451923E-9 1.919549592238544E-10 -1.82534542584029E-9 5.785927141871158E-9
q -1.535529932639583E-11 9.769866549140098E-13 2.359442158865418E-10 -1.12115564699579E-11 8.320684383419533E-11 -3.360523234762506E-10
tp -4.342950519451923E-9 2.359442158865418E-10 7.335866264253073E-8 -3.117031897602868E-9 3.346325421879227E-8 -9.409216642876554E-8
node 1.919549592238544E-10 -1.12115564699579E-11 -3.117031897602868E-9 1.505311812186122E-10 -1.30130403081284E-9 4.147847939894301E-9
peri -1.82534542584029E-9 8.320684383419533E-11 3.346325421879227E-8 -1.30130403081284E-9 1.801564429837529E-8 -3.912136813169185E-8
i 5.785927141871158E-9 -3.360523234762506E-10 -9.409216642876554E-8 4.147847939894301E-9 -3.912136813169185E-8 1.26319196782867E-7

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 24.3   .29321 E2018W53 autocmod 2.6q

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