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(2018 XZ4)
Classification: Apollo [NEO]          SPK-ID: 3836915
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4734284718596638 0.00027126  
a 1.79493269234271 0.00089567 au
q .9451604507159486 1.526e-05 au
i 7.134885888200063 0.0030968 deg
node 84.76882730832038 0.00044129 deg
peri 319.9448532679114 0.00075009 deg
M 32.92149391323252 0.29414 deg
tp 2459316.175558949147
(2021-Apr-11.67555895)
0.65755 TDB
period 878.3562147732422
2.40
0.65745
0.0018
d
yr
n .40985649551411 0.00030678 deg/d
Q 2.644704933969471 0.0013197 au
  Orbit Determination Parameters
   # obs. used (total)      124  
   data-arc span      26 days  
   first obs. used      2018-12-14  
   last obs. used      2019-01-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .44993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:56:08  

Additional Information
 Earth MOID = .0192851 au 
 Jupiter MOID = 2.77807 au 
 T_jup = 3.926 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458470.5 (2018-Dec-18.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4742014335467202 0.0002708  
q .9437929465610319 1.6261e-05 au
tp 2458437.976042795365
(2018-Nov-15.47604280)
0.0022793 TDB
node 84.77515401401541 0.00038969 deg
peri 319.9448204180383 0.00093418 deg
i 7.139292219094387 0.0030925 deg
  Orbit Determination Parameters
   # obs. used (total)      124  
   data-arc span      26 days  
   first obs. used      2018-12-14  
   last obs. used      2019-01-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .44993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:56:08  

Additional Information
 Jupiter MOID = 2.77807 au 
 T_jup = 3.926 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.333406379347424E-8 -4.401867526733299E-9 6.168561639876945E-7 -1.054831543552235E-7 -2.51312971791717E-7 8.374468227200655E-7
q -4.401867526733299E-9 2.644074581219643E-10 -3.699266316627561E-8 6.334196810876943E-9 1.513028264556452E-8 -5.026878376433118E-8
tp 6.168561639876945E-7 -3.699266316627561E-8 5.195146515239332E-6 -8.868265049709473E-7 -2.105412288505884E-6 7.043975089721848E-6
node -1.054831543552235E-7 6.334196810876943E-9 -8.868265049709473E-7 1.5185561468685E-7 3.619970201583748E-7 -1.204703860433767E-6
peri -2.51312971791717E-7 1.513028264556452E-8 -2.105412288505884E-6 3.619970201583748E-7 8.726951002581728E-7 -2.870167505114505E-6
i 8.374468227200655E-7 -5.026878376433118E-8 7.043975089721848E-6 -1.204703860433767E-6 -2.870167505114505E-6 9.563637004283397E-6

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 23.3   .65098 E2018Y96 autocmod 2.6q

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