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(2018 EM4)
Classification: Apollo [NEO]          SPK-ID: 3801932
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 .2714001327699739 0.00019742  
a 1.281427483498886 0.00027958 au
q .933647894342195 4.9286e-05 au
i 2.885407270835404 0.0018512 deg
node 6.429871713355941 0.00043383 deg
peri 227.7068389017548 0.0043662 deg
M 288.0953045302566 0.21143 deg
tp 2459306.326450274273
(2021-Apr-01.82645027)
0.34581 TDB
period 529.8335783199194
1.45
0.1734
0.0004747
d
yr
n .6794586351841748 0.00022236 deg/d
Q 1.629207072655577 0.00035546 au
  Orbit Determination Parameters
   # obs. used (total)      41  
   data-arc span      23 days  
   first obs. used      2018-03-06  
   last obs. used      2018-03-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .37197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:24:14  

Additional Information
 Earth MOID = .00139062 au 
 Jupiter MOID = 3.36743 au 
 T_jup = 5.015 
[ 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 25.3   n/a E2018G20  

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