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382421 (1998 SJ53)
Classification: Main-belt Asteroid          SPK-ID: 2382421
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1890988871894443 6.4566e-08  
a 2.376905638440023 1.807e-08 au
q 1.927435427256699 1.5563e-07 au
i 1.755401195535255 8.7872e-06 deg
node 24.21722795534706 0.00035652 deg
peri 20.23383030078853 0.0003589 deg
M 313.6265203400533 4.3807e-05 deg
tp 2459172.918364835237
(2020-Nov-19.41836483)
0.00016429 TDB
period 1338.493720890574
3.66
1.5263e-05
4.179e-08
d
yr
n .2689590502975778 3.067e-09 deg/d
Q 2.826375849623347 2.1486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      75  
   data-arc span      7098 days (19.43 yr)  
   first obs. used      1998-09-30  
   last obs. used      2018-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57302  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:29:18  

Additional Information
 Earth MOID = .936642 au 
 Jupiter MOID = 2.57071 au 
 T_jup = 3.516 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456678.5 (2014-Jan-21.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906739874464814 6.497e-08  
q 1.924109455093404 1.5697e-07 au
tp 2456495.344652942693
(2013-Jul-21.84465294)
0.0001408 TDB
node 24.37218808930554 0.00035552 deg
peri 20.01349207957475 0.00035784 deg
i 1.758940475986689 8.7912e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      75  
   data-arc span      7098 days (19.43 yr)  
   first obs. used      1998-09-30  
   last obs. used      2018-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57302  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:29:18  

Additional Information
 Jupiter MOID = 2.57071 au 
 T_jup = 3.516 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.221108422364823E-15 -1.015592950195441E-14 -2.111153164635701E-12 5.556890624473238E-14 -6.214896609620561E-13 -1.487563937322531E-15
q -1.015592950195441E-14 2.464062255469293E-14 6.260986145091033E-12 -1.27072351722139E-13 1.832039558092428E-12 3.829713883368848E-15
tp -2.111153164635701E-12 6.260986145091033E-12 1.982502593315957E-8 -6.498800599740162E-11 5.878507653057594E-9 6.864152542795316E-12
node 5.556890624473238E-14 -1.27072351722139E-13 -6.498800599740162E-11 1.263912297376787E-7 -1.263487101120513E-7 -1.289447646043084E-9
peri -6.214896609620561E-13 1.832039558092428E-12 5.878507653057594E-9 -1.263487101120513E-7 1.280518429251223E-7 1.290850186873472E-9
i -1.487563937322531E-15 3.829713883368848E-15 6.864152542795316E-12 -1.289447646043084E-9 1.290850186873472E-9 7.728537854751222E-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 18.1   n/a MPO440655  

382421 (1998 SJ53)          Discovered 1998-Sep-30 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-01-21

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Alternate Designations
 1998 SJ53 = 2009 WR265 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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