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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1750414278281946 4.0346e-08  
a 2.816225658281502 1.6907e-08 au
q 2.32326949796951 1.1339e-07 au
i 4.604242100934679 4.7731e-06 deg
node 351.6444479324909 5.7103e-05 deg
peri 69.96334090832164 5.8657e-05 deg
M 265.3422367997002 1.3762e-05 deg
tp 2459454.392848691279
(2021-Aug-27.89284869)
6.728e-05 TDB
period 1726.233749925996
4.73
1.5545e-05
4.256e-08
d
yr
n .2085464961019521 1.8779e-09 deg/d
Q 3.309181818593493 1.9866e-08 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      7883 days (21.58 yr)  
   first obs. used      1997-11-30  
   last obs. used      2019-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 11:50:03  

Additional Information
 Earth MOID = 1.34094 au 
 Jupiter MOID = 2.04981 au 
 T_jup = 3.292 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456380.5 (2013-Mar-29.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787525346518171 4.0898e-08  
q 2.309073426011008 1.1557e-07 au
tp 2455999.509544133946
(2012-Mar-13.00954413)
5.9411e-05 TDB
node 352.1403494993349 5.7051e-05 deg
peri 68.40758039801035 5.8484e-05 deg
i 4.610739115589405 4.7797e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      7883 days (21.58 yr)  
   first obs. used      1997-11-30  
   last obs. used      2019-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 11:50:03  

Additional Information
 Jupiter MOID = 2.04981 au 
 T_jup = 3.292 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.672630034963859E-15 -4.696387826773726E-15 -2.054145156949597E-13 7.434689474865476E-15 -4.476158557528057E-14 -1.048248854520036E-15
q -4.696387826773726E-15 1.33574792705736E-14 5.456244819320524E-13 -2.022517572947737E-14 1.2490176714721E-13 3.34534796902551E-15
tp -2.054145156949597E-13 5.456244819320524E-13 3.529724642196144E-9 -3.163027953074055E-12 7.884534183320207E-10 4.698195450775809E-13
node 7.434689474865476E-15 -2.022517572947737E-14 -3.163027953074055E-12 3.254762144429833E-9 -3.244295917428692E-9 1.843126849642997E-11
peri -4.476158557528057E-14 1.2490176714721E-13 7.884534183320207E-10 -3.244295917428692E-9 3.420400354981047E-9 -1.82506394292716E-11
i -1.048248854520036E-15 3.34534796902551E-15 4.698195450775809E-13 1.843126849642997E-11 -1.82506394292716E-11 2.284594651410177E-11

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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