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(2018 ER4)
Classification: Amor [NEO]          SPK-ID: 3801942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4646565306364433 4.052e-05  
a 1.902730882887515 0.00014622 au
q 1.018614552110185 1.1831e-06 au
i 2.325673298855774 0.00016055 deg
node .0259924887231299 0.000682 deg
peri 220.598879392263 0.00056161 deg
M 283.3422764317797 0.032739 deg
tp 2459204.635198374171
(2020-Dec-21.13519837)
0.11071 TDB
period 958.6597148205373
2.62
0.1105
0.0003025
d
yr
n .3755242808626757 4.3287e-05 deg/d
Q 2.786847213664844 0.00021416 au
  Orbit Determination Parameters
   # obs. used (total)      56  
   data-arc span      98 days  
   first obs. used      2018-03-14  
   last obs. used      2018-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .3963  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jun-21 06:27:22  

Additional Information
 Earth MOID = .0273738 au 
 Jupiter MOID = 2.19811 au 
 T_jup = 3.805 
[ 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 22.2   n/a E2018M75  

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