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(2018 XC4)
Classification: Apollo [NEO]          SPK-ID: 3836892
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3104253812182952 2.0155e-06  
a 1.267834045707893 4.2028e-06 au
q .8742661787474867 8.0502e-07 au
i 2.171083358204334 5.3525e-05 deg
node 95.08811134040683 0.00044323 deg
peri 52.38086743246211 0.00067303 deg
M 110.0617562064246 0.002221 deg
tp 2459041.086176144376
(2020-Jul-10.58617614)
0.0024243 TDB
period 521.4252303987372
1.43
0.0025928
7.099e-06
d
yr
n .6904153827092442 3.4331e-06 deg/d
Q 1.661401912668299 5.5075e-06 au
  Orbit Determination Parameters
   # obs. used (total)      68  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      6 days  
   first obs. used      2018-12-13  
   last obs. used      2018-12-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .40516  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:56:04  

Additional Information
 Earth MOID = .0035419 au 
 Jupiter MOID = 3.34346 au 
 T_jup = 5.042 
[ 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 26.3   .49875 E2018Y73 autocmod 2.6q

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