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74506 (1999 EJ4)
Classification: Main-belt Asteroid          SPK-ID: 2074506
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1750414154060637 3.4589e-08  
a 2.816225652922107 1.3459e-08 au
q 2.323269528531756 1.0175e-07 au
i 4.604239296192334 4.3806e-06 deg
node 351.6443907724529 4.4953e-05 deg
peri 69.96339933847811 4.681e-05 deg
M 265.3422373574494 1.3733e-05 deg
tp 2459454.392844721154
(2021-Aug-27.89284472)
6.695e-05 TDB
period 1726.233744998354
4.73
1.2375e-05
3.388e-08
d
yr
n .2085464966972611 1.495e-09 deg/d
Q 3.309181777312458 1.5815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1225  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1997-11-30  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53185  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:24  

Additional Information
 Earth MOID = 1.34094 au 
 Jupiter MOID = 2.04981 au 
 T_jup = 3.292 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO347992  

74506 (1999 EJ4)          Discovered 1999-Mar-12 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 EJ4 = 2001 OU45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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