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201071 (2002 EP122)
Classification: Main-belt Asteroid          SPK-ID: 2201071
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263926200579928 7.9428e-08  
a 2.536598857909938 2.5324e-08 au
q 2.215991482222589 2.0117e-07 au
i 1.199780942225573 5.7653e-06 deg
node 233.2183774264614 0.00038814 deg
peri 76.36756585142143 0.00038877 deg
M 56.63961315326378 2.779e-05 deg
tp 2458768.336526162651
(2019-Oct-11.83652616)
0.00011219 TDB
period 1475.625378218697
4.04
2.2097e-05
6.05e-08
d
yr
n .2439643593244339 3.6534e-09 deg/d
Q 2.857206233597287 2.8524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      169  
   data-arc span      5870 days (16.07 yr)  
   first obs. used      2002-02-20  
   last obs. used      2018-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54795  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 16:33:59  

Additional Information
 Earth MOID = 1.20179 au 
 Jupiter MOID = 2.37072 au 
 T_jup = 3.436 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456643.5 (2013-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1265182564255557 7.9127e-08  
q 2.216054859821494 2.0047e-07 au
tp 2457294.998241496036
(2015-Sep-29.49824150)
0.0001038 TDB
node 233.2575246489405 0.00038831 deg
peri 76.95274224978158 0.00038894 deg
i 1.198933958408386 5.7663e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      169  
   data-arc span      5870 days (16.07 yr)  
   first obs. used      2002-02-20  
   last obs. used      2018-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54795  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 16:33:59  

Additional Information
 Jupiter MOID = 2.37072 au 
 T_jup = 3.436 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.261058289635715E-15 -1.576574874565476E-14 -3.1335396931418E-13 1.615179786701877E-13 -9.814288786193923E-14 8.555809193366815E-16
q -1.576574874565476E-14 4.018726749546807E-14 1.479473895276014E-12 -4.131106616704688E-13 3.572188654972436E-13 -1.883003101821796E-15
tp -3.1335396931418E-13 1.479473895276014E-12 1.077425822216329E-8 1.665468542430344E-11 2.398719138092597E-9 1.790187390007734E-12
node 1.615179786701877E-13 -4.131106616704688E-13 1.665468542430344E-11 1.507822923371114E-7 -1.50741785418712E-7 7.351860706610548E-11
peri -9.814288786193923E-14 3.572188654972436E-13 2.398719138092597E-9 -1.50741785418712E-7 1.512741685929311E-7 -7.309326592085562E-11
i 8.555809193366815E-16 -1.883003101821796E-15 1.790187390007734E-12 7.351860706610548E-11 -7.309326592085562E-11 3.325055130086837E-11

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 16.6   n/a MPO436979  

201071 (2002 EP122)          Discovered 2002-Mar-12 by NEAT at Palomar
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12

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Alternate Designations
 2002 EP122 = 2006 DD53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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