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52686 (1998 EN11)
Classification: Main-belt Asteroid          SPK-ID: 2052686
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1597753647753178 3.6004e-08  
a 3.156175594417805 2.4035e-08 au
q 2.651896487524745 1.1909e-07 au
i 26.66073715813245 5.9964e-06 deg
node 159.6955493194975 9.0914e-06 deg
peri 77.06267195118359 2.0976e-05 deg
M 298.7006179233911 1.9338e-05 deg
tp 2459349.233572380987
(2021-May-14.73357238)
0.00011159 TDB
period 2048.048149983901
5.61
2.3395e-05
6.405e-08
d
yr
n .1757771173508932 2.0079e-09 deg/d
Q 3.660454701310865 2.7876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      734  
   data-arc span      9387 days (25.70 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57385  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 10:25:26  

Additional Information
 Earth MOID = 1.78261 au 
 Jupiter MOID = 1.68242 au 
 T_jup = 3.023 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457145.5 (2015-May-03.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159616758595917 3.6077e-08  
q 2.652042991765676 1.193e-07 au
tp 2457297.792745195924
(2015-Oct-02.29274520)
0.00010408 TDB
node 159.7339173655969 9.0912e-06 deg
peri 76.57666613998525 2.0973e-05 deg
i 26.66132957138955 5.9966e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      734  
   data-arc span      9387 days (25.70 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57385  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 10:25:26  

Additional Information
 Jupiter MOID = 1.68242 au 
 T_jup = 3.023 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.301520426116746E-15 -4.244547929583804E-15 -6.349456579599648E-13 1.833883723406614E-16 -1.076761961325719E-13 1.326177823397353E-15
q -4.244547929583804E-15 1.423269333588856E-14 2.485490037818811E-12 1.906554299850315E-15 4.148711931043575E-13 -5.357316008143198E-15
tp -6.349456579599648E-13 2.485490037818811E-12 1.083201535330887E-8 -1.451891231230276E-11 1.982966627347064E-9 -3.038178460858698E-12
node 1.833883723406614E-16 1.906554299850315E-15 -1.451891231230276E-11 8.265016834654609E-11 -7.603086050677457E-11 -2.332804529381356E-12
peri -1.076761961325719E-13 4.148711931043575E-13 1.982966627347064E-9 -7.603086050677457E-11 4.398538559530289E-10 1.488612774524066E-12
i 1.326177823397353E-15 -5.357316008143198E-15 -3.038178460858698E-12 -2.332804529381356E-12 1.488612774524066E-12 3.595965090271172E-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 14.2   n/a MPO337679  
diameter diameter 9.162 km 0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52686 (1998 EN11)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 EN11 = 1994 PY15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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