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(2018 XE2)
Classification: Apollo [NEO]          SPK-ID: 3836759
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 2458463.5 (2018-Dec-11.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7318217307126067 0.0018147  
a 2.175317991526041 0.01244 au
q .5833730141171821 0.00061148 au
i 6.438133771362264 0.018296 deg
node 251.068299437183 0.00074108 deg
peri 277.9657944411975 0.0021035 deg
M 345.1763397984665 0.14387 deg
tp 2458511.754242790833
(2019-Jan-28.25424279)
0.054395 TDB
period 1171.878413868583
3.21
10.053
0.02752
d
yr
n .3071991050774411 0.0026352 deg/d
Q 3.7672629689349 0.021544 au
  Orbit Determination Parameters
   # obs. used (total)      47  
   data-arc span      3 days  
   first obs. used      2018-12-10  
   last obs. used      2018-12-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .46942  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:53  

Additional Information
 Earth MOID = .0165021 au 
 Jupiter MOID = 1.33704 au 
 T_jup = 3.268 
[ 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 24.9   .50791 E2018-XA6 autocmod 2.6q

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2018-Dec-14 06:45 < 00:01 Earth 0.027326167275891 0.0271200202728229 0.0275323129345296 21.1489628007061 21.1443518348457 2458466.781232784 0.0742812004022291 10275.2387206136 28.0489328210068 0.151725628909968 332.120872372145 T 3 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:54 2021-Apr-15 20:55
2019-Feb-18 23:28 11:35 Venus 0.0884389804567769 0.0839329373732809 0.0930984083038118 16.9752670065333 16.9738204776539 2458533.477833847 694.945498980519 293208.924328792 278.90936483532 -38.7329776437004 28265.7111195862 T 3 CATAB v2.0g-lin.ifort 2021-Apr-15 20:55:54 2021-Apr-15 20:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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