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(2018 TW1)
Classification: Apollo [NEO]          SPK-ID: 3831214
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 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .47128009074657 0.00048351  
a 1.898287004001068 0.0017446 au
q 1.00366213249241 4.6116e-06 au
i 8.660273127191154 0.0063561 deg
node 192.8323123287086 0.0002329 deg
peri 191.6848114455877 0.0030846 deg
M 223.4627874267427 0.30684 deg
tp 2459362.817883114219
(2021-May-28.31788311)
1.3137 TDB
period 955.3032134088419
2.62
1.3169
0.003605
d
yr
n .3768437025511507 0.00051949 deg/d
Q 2.792911875509726 0.0025667 au
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      2 days  
   first obs. used      2018-10-05  
   last obs. used      2018-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .511  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-07 09:12:11  

Additional Information
 Earth MOID = .0107613 au 
 Jupiter MOID = 2.66379 au 
 T_jup = 3.794 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458397.5 (2018-Oct-06.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4737477174727357 0.00047872  
q 1.003954096129764 7.6188e-06 au
tp 2458407.485002454994
(2018-Oct-15.98500245)
0.0036009 TDB
node 192.8668365817022 0.00013979 deg
peri 191.5094293313441 0.00257 deg
i 8.684254507823477 0.0062924 deg
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      2 days  
   first obs. used      2018-10-05  
   last obs. used      2018-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .511  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-07 09:12:11  

Additional Information
 Jupiter MOID = 2.66379 au 
 T_jup = 3.794 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.291703584207847E-7 3.62894379413072E-9 -1.701517528599541E-6 6.686671409898821E-8 -1.18541958908842E-6 3.012161953015259E-6
q 3.62894379413072E-9 5.804655732545833E-11 -2.738299412659172E-8 1.056770533780249E-9 -1.929463902850792E-8 4.767420297252127E-8
tp -1.701517528599541E-6 -2.738299412659172E-8 1.29666233513088E-5 -4.948213531574113E-7 9.198517888081882E-6 -2.234565022608073E-5
node 6.686671409898821E-8 1.056770533780249E-9 -4.948213531574113E-7 1.954107047015524E-8 -3.439456928064022E-7 8.788672317142041E-7
peri -1.18541958908842E-6 -1.929463902850792E-8 9.198517888081882E-6 -3.439456928064022E-7 6.604898841820335E-6 -1.555851116737024E-5
i 3.012161953015259E-6 4.767420297252127E-8 -2.234565022608073E-5 8.788672317142041E-7 -1.555851116737024E-5 3.959409108313175E-5

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 27.8   .34321 MPO458800 autocmod 2.6n

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