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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1750414230528819 3.6669e-08  
a 2.816225656553965 1.4699e-08 au
q 2.323269509992722 1.0591e-07 au
i 4.604240532718643 4.4903e-06 deg
node 351.6444250466959 5.179e-05 deg
peri 69.96336422451758 5.3395e-05 deg
M 265.3422369236409 1.3749e-05 deg
tp 2459454.392847679329
(2021-Aug-27.89284768)
6.7107e-05 TDB
period 1726.23374833763
4.73
1.3515e-05
3.7e-08
d
yr
n .2085464962938429 1.6327e-09 deg/d
Q 3.309181803115207 1.7272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      8280 days (22.67 yr)  
   first obs. used      1997-11-30  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:12:44  

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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