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(2018 XJ1)
Classification: Apollo [NEO]          SPK-ID: 3836745
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4305065581921551 4.7104e-06  
a 1.752978034610832 1.4926e-05 au
q .9983094943440743 2.4608e-07 au
i 5.485753967545006 4.9398e-05 deg
node 84.01163064260047 1.7793e-05 deg
peri 359.9443373844552 8.6096e-05 deg
M 310.8384069657953 0.0039635 deg
tp 2459316.267481354974
(2021-Apr-11.76748135)
0.010812 TDB
period 847.7409033265862
2.32
0.010827
2.964e-05
d
yr
n .4246580512835211 5.4237e-06 deg/d
Q 2.50764657487759 2.1352e-05 au
  Orbit Determination Parameters
   # obs. used (total)      45  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10 days  
   first obs. used      2018-12-09  
   last obs. used      2018-12-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .37757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Earth MOID = .0140981 au 
 Jupiter MOID = 2.74959 au 
 T_jup = 4.011 
[ 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   .39187 E2018Y42 autocmod 2.6q

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