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(2018 XE4)
Classification: Apollo [NEO]          SPK-ID: 3836890
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 2458465.5 (2018-Dec-13.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4471822761890016 0.0016543  
a 1.590170783040666 0.0041915 au
q .879074592751294 0.00031389 au
i 3.062623920606645 0.010465 deg
node 264.4756852261819 0.0043971 deg
peri 237.8672519774184 0.016084 deg
M 335.4649211546927 0.10743 deg
tp 2458515.417064611748
(2019-Jan-31.91706461)
0.022311 TDB
period 732.4265543848602
2.01
2.8959
0.007929
d
yr
n .491516859738041 0.0019434 deg/d
Q 2.301266973330038 0.0060659 au
  Orbit Determination Parameters
   # obs. used (total)      11  
   data-arc span      2 days  
   first obs. used      2018-12-12  
   last obs. used      2018-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .90817  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-10 05:36:24  

Additional Information
 Earth MOID = .00793712 au 
 Jupiter MOID = 2.73792 au 
 T_jup = 4.260 
[ show covariance matrix ]

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 26.4   .25724 E2018-XC6 autocmod 2.6q

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