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52281 (1989 SJ1)
Classification: Main-belt Asteroid          SPK-ID: 2052281
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2218055896348735 4.8486e-08  
a 2.542369814229431 1.0423e-08 au
q 1.978457978514369 1.261e-07 au
i 3.715730165146094 3.9424e-06 deg
node 73.94506553094234 7.604e-05 deg
peri 268.6190054159867 7.6678e-05 deg
M 317.6531314632985 1.3325e-05 deg
tp 2459570.670786105575
(2021-Dec-22.17078611)
5.5575e-05 TDB
period 1480.663982123363
4.05
9.1055e-06
2.493e-08
d
yr
n .2431341643657313 1.4952e-09 deg/d
Q 3.106281649944494 1.2735e-08 au
  Orbit Determination Parameters
   # obs. used (total)      841  
   data-arc span      14528 days (39.78 yr)  
   first obs. used      1981-09-24  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55242  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:13:22  

Additional Information
 Earth MOID = .973966 au 
 Jupiter MOID = 2.30977 au 
 T_jup = 3.407 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456934.5 (2014-Oct-04.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204703410882685 4.8782e-08  
q 1.982286306023426 1.2678e-07 au
tp 2456604.571532383710
(2013-Nov-08.07153238)
4.4484e-05 TDB
node 74.1631988346706 7.5981e-05 deg
peri 267.7279247365274 7.6623e-05 deg
i 3.717285034719807 3.9482e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      841  
   data-arc span      14528 days (39.78 yr)  
   first obs. used      1981-09-24  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55242  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:13:22  

Additional Information
 Jupiter MOID = 2.30977 au 
 T_jup = 3.407 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.379704730826596E-15 -6.172541884319415E-15 -1.159950310776159E-12 3.466162121286431E-14 -2.84384770068131E-13 -9.848608996853631E-16
q -6.172541884319415E-15 1.607317784193459E-14 3.136653751909258E-12 -9.000911949476567E-14 7.675642233066116E-13 2.775298654380247E-15
tp -1.159950310776159E-12 3.136653751909258E-12 1.978848028653355E-9 -1.795176829344188E-11 4.76525067824682E-10 1.690314851726078E-12
node 3.466162121286431E-14 -9.000911949476567E-14 -1.795176829344188E-11 5.773088578865444E-9 -5.76446794524594E-9 9.967314229358874E-11
peri -2.84384770068131E-13 7.675642233066116E-13 4.76525067824682E-10 -5.76446794524594E-9 5.87110957524987E-9 -9.907861287230473E-11
i -9.848608996853631E-16 2.775298654380247E-15 1.690314851726078E-12 9.967314229358874E-11 -9.907861287230473E-11 1.558841535388688E-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 15.31   n/a MPO636791  

52281 (1989 SJ1)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 SJ1 = 1981 SL8 = 1981 UG25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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