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(2018 XE)
Classification: Apollo [NEO]          SPK-ID: 3836711
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3908226039976931 0.00027668  
a 1.54798829115359 0.00065893 au
q .9429994762470049 2.6965e-05 au
i 5.246305222846961 0.0029672 deg
node 69.6592732532384 0.00031998 deg
peri 323.1941207123066 0.0022783 deg
M 294.5345764055904 0.18873 deg
tp 2459128.426175256577
(2020-Oct-05.92617526)
0.45048 TDB
period 703.4770503845066
1.93
0.44917
0.00123
d
yr
n .5117437730246227 0.00032675 deg/d
Q 2.152977106060176 0.00091645 au
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      5 days  
   first obs. used      2018-12-03  
   last obs. used      2018-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .33552  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-27 14:01:26  

Additional Information
 Earth MOID = .00602643 au 
 Jupiter MOID = 3.2881 au 
 T_jup = 4.361 
[ 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 25.5   .5606 MPO477910 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
2016-Aug-16 01:03 13:24 Mars 0.0523046917554729 0.0452260237958831 0.064826637582929 9.04037198016076 9.03976650855301 2457616.544016622 803.633299647889 982474.339607337 100.412507151065 58.4469908327657 65981.7117504725 T 7 CATAB v2.0e-lin.ifort 2019-Jul-27 14:01:30 2019-Jul-27 14:01
2018-Dec-01 13:32 < 00:01 Earth 0.0146876168694446 0.0146595674960152 0.0147156656762479 8.2800702284065 8.25813194106319 2458454.064152243 0.0796211183691894 1391.25776590477 20.9304051979373 0.570531374183547 960.244414418755 T 7 CATAB v2.0e-lin.ifort 2019-Jul-27 14:01:30 2019-Jul-27 14:01
2020-Aug-25 07:56 1_14:56 Earth 0.226307761865345 0.205485277861196 0.247566831676096 13.6097130798699 13.6088479571031 2459086.830387369 2335.67243613196 1160464.3553935 266.126665444103 25.1838610115059 41205.4213235855 T 7 CATAB v2.0e-lin.ifort 2019-Jul-27 14:01:30 2019-Jul-27 14:01
2021-Jan-14 08:32 2_21:50 Earth 0.495823930894925 0.479782114022442 0.512143733927135 5.24372799352811 5.24270308015072 2459228.855885263 4189.73607899873 996941.297759306 462.943841736605 36.020026661312 31651.9787998573 T 7 CATAB v2.0e-lin.ifort 2019-Jul-27 14:01:30 2019-Jul-27 14:01
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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