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JPL Small-Body Database Browser
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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 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1956-Jan-10 01:13 00:03 Amphi 0.0272619471973976 0.0272571565170162 0.0272667424637503 2.38759020867464 2.38759012035519 2435482.550868687 2.67456757231295 652.265391774168 95.0248391493223 -70.1567080249267 40367.5326561819 T 10 CATAB v2.0e-lin.ifort 2019-Jul-13 13:29:20 2019-Jul-13 13:29

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