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4818 Elgar (1984 EM)
Classification: Main-belt Asteroid          SPK-ID: 2004818
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1294540148976476 1.3523e-08  
a 2.264985659338196 5.5878e-09 au
q 1.971774172051271 3.0251e-08 au
i 2.543575572374937 7.812e-07 deg
node 169.0546385830407 1.4419e-05 deg
peri 82.80697079863894 1.9132e-05 deg
M 210.936138760723 6.8889e-06 deg
tp 2459716.044879539742
(2022-May-16.54487954)		 2.4473e-05 TDB
period 1245.078150339797
3.41		 4.6075e-06
1.261e-08		 d
yr
n .2891384768913917 1.07e-09 deg/d
Q 2.558197146625121 6.3112e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2685  
   data-arc span      32123 days (87.95 yr)  
   first obs. used      1933-03-23  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:58:48  

Additional Information
 Earth MOID = .957828 au 
 Jupiter MOID = 2.46897 au 
 T_jup = 3.604 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO502199  

4818 Elgar (1984 EM)          Discovered 1984-Mar-01 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1984 EM = 1933 FZ 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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