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JPL Small-Body Database Browser
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(2018 EJ4)
Classification: Amor [NEO, PHA]          SPK-ID: 3801934
[ 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 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1834328442239171 1.1894e-08  
a 1.256943929974866 1.3066e-08 au
q 1.026379129869588 1.4169e-08 au
i 10.38807371477915 3.7736e-06 deg
node 78.09965104311412 3.1807e-06 deg
peri 188.2285223263811 1.5848e-05 deg
M 138.901126093882 9.6695e-06 deg
tp 2458801.901689181905
(2019-Nov-14.40168918)		 1.3246e-05 TDB
period 514.7214706250205
1.41		 8.0259e-06
2.197e-08		 d
yr
n .6994073893262235 1.0906e-08 deg/d
Q 1.487508730080144 1.5463e-08 au
   Orbit Determination Parameters
   # obs. used (total)      514  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      2524 days (6.91 yr)  
   first obs. used      2011-11-30  
   last obs. used      2018-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .28927  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-17 19:45:07  

Additional Information
 Earth MOID = .0128105 au 
 Jupiter MOID = 3.5716 au 
 T_jup = 5.090 
[ 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 21.4   n/a E2018L55  
rotation period rot_per 7.485 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2018) Minor Planet Bull. 45, 366-379.]

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