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(2018 XC)
Classification: Aten [NEO]          SPK-ID: 3836709
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4035311341261896 0.00046244  
a .7899366072543338 4.1723e-05 au
q .4711725922411981 0.00039016 au
i 21.32800878465645 0.04342 deg
node 69.8261637495805 0.00035815 deg
peri 212.2190414164941 0.011502 deg
M 161.3985865838626 0.0098316 deg
tp 2458885.530137008148
(2020-Feb-06.03013701)
0.015717 TDB
period 256.4406018237405
0.70
0.020317
5.562e-05
d
yr
n 1.403833860316078 0.00011122 deg/d
Q 1.10870062226747 5.856e-05 au
  Orbit Determination Parameters
   # obs. used (total)      48  
   data-arc span      7 days  
   first obs. used      2018-12-03  
   last obs. used      2018-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .39412  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-27 14:01:26  

Additional Information
 Earth MOID = .0134891 au 
 Jupiter MOID = 4.02707 au 
 T_jup = 7.251 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458457.5 (2018-Dec-05.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4036178256279865 0.00046184  
q .4711045896918238 0.00038954 au
tp 2458372.658279332210
(2018-Sep-11.15827933)
0.05603 TDB
node 69.83131114475954 0.00033552 deg
peri 212.2184552244372 0.011484 deg
i 21.33600583578741 0.0434 deg
  Orbit Determination Parameters
   # obs. used (total)      48  
   data-arc span      7 days  
   first obs. used      2018-12-03  
   last obs. used      2018-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .39412  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-27 14:01:26  

Additional Information
 Jupiter MOID = 4.02707 au 
 T_jup = 7.251 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.132956359400989E-7 -1.799049004361388E-7 2.587663408716857E-5 1.545202667064134E-7 5.299001413746017E-6 2.004346942372545E-5
q -1.799049004361388E-7 1.517428307661462E-7 -2.182535726194615E-5 -1.303135441117979E-7 -4.468879543774357E-6 -1.690565940019224E-5
tp 2.587663408716857E-5 -2.182535726194615E-5 .003139414834780736 1.875235049761675E-5 .0006430230470114135 .002431631671514538
node 1.545202667064134E-7 -1.303135441117979E-7 1.875235049761675E-5 1.125767159087701E-7 3.846702320162241E-6 1.45196268472618E-5
peri 5.299001413746017E-6 -4.468879543774357E-6 .0006430230470114135 3.846702320162241E-6 .0001318830307892814 .0004979599698738441
i 2.004346942372545E-5 -1.690565940019224E-5 .002431631671514538 1.45196268472618E-5 .0004979599698738441 .001883558188796048

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 25.7   .40491 MPO477909 autocmod 2.6q

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