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52252 (1981 EJ35)
Classification: Main-belt Asteroid          SPK-ID: 2052252
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1791796134151968 3.6734e-08  
a 2.395892852343012 9.5685e-09 au
q 1.966597697275958 9.1141e-08 au
i 5.075491700260189 4.5234e-06 deg
node 167.5584120226789 4.5624e-05 deg
peri 317.7175943908372 4.7932e-05 deg
M 343.7957840258896 1.3937e-05 deg
tp 2459457.471241310768
(2021-Aug-30.97124131)
5.2563e-05 TDB
period 1354.563954648934
3.71
8.1146e-06
2.222e-08
d
yr
n .2657681822733149 1.5921e-09 deg/d
Q 2.825188007410066 1.1283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      621  
   data-arc span      14613 days (40.01 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56055  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:43:49  

Additional Information
 Earth MOID = .985751 au 
 Jupiter MOID = 2.24651 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457679.5 (2016-Oct-18.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775371287699047 3.6594e-08  
q 1.971316242193903 9.0698e-08 au
tp 2458101.586869594123
(2017-Dec-14.08686959)
5.1333e-05 TDB
node 167.6736596510826 4.5637e-05 deg
peri 317.3967985747245 4.8013e-05 deg
i 5.073493534884927 4.5236e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      621  
   data-arc span      14613 days (40.01 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56055  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:43:49  

Additional Information
 Jupiter MOID = 2.24651 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.339087143949838E-15 -3.307918174031605E-15 2.859325603882714E-13 -1.653537694025258E-14 1.488994834429486E-13 -3.941635100177163E-16
q -3.307918174031605E-15 8.226116881812184E-15 -6.082415633286872E-13 3.919923761029593E-14 -3.459375901799373E-13 1.158338415663566E-15
tp 2.859325603882714E-13 -6.082415633286872E-13 2.635086470683058E-9 -4.12152030667821E-11 7.751555585353349E-10 -6.896205896719477E-13
node -1.653537694025258E-14 3.919923761029593E-14 -4.12152030667821E-11 2.082711547901963E-9 -2.085762131594998E-9 5.157884433704482E-11
peri 1.488994834429486E-13 -3.459375901799373E-13 7.751555585353349E-10 -2.085762131594998E-9 2.305276678536027E-9 -5.163048798279237E-11
i -3.941635100177163E-16 1.158338415663566E-15 -6.896205896719477E-13 5.157884433704482E-11 -5.163048798279237E-11 2.046275635808692E-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 16.39   n/a MPCxxxxx  
diameter diameter 3.307 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52252 (1981 EJ35)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

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