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173820 (2001 SJ328)
Classification: Main-belt Asteroid          SPK-ID: 2173820
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1182671439819264 5.5703e-08  
a 2.757251608121381 2.6694e-08 au
q 2.431159335189292 1.5685e-07 au
i 3.243081246834173 5.8944e-06 deg
node 315.5777888827294 0.0001229 deg
peri 6.451548982845635 0.00012593 deg
M 35.86683480882734 2.8352e-05 deg
tp 2458833.889036186161
(2019-Dec-16.38903619)
0.00013106 TDB
period 1672.295514579956
4.58
2.4285e-05
6.649e-08
d
yr
n .2152729567599325 3.1262e-09 deg/d
Q 3.08334388105347 2.9851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      278  
   data-arc span      6112 days (16.73 yr)  
   first obs. used      2001-07-27  
   last obs. used      2018-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62716  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 07:09:43  

Additional Information
 Earth MOID = 1.41857 au 
 Jupiter MOID = 2.20244 au 
 T_jup = 3.331 
[ 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 16.2   n/a MPO446073  
diameter diameter 3.098 km 0.932 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173820 (2001 SJ328)          Discovered 2001-Sep-19 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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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
2026-Oct-29 15:42 00:01 Psych 0.0166601191846556 0.0166560192245978 0.0166642193863919 2.73106834714683 2.73106808123203 2461343.154098422 1.33277065708159 230.584479623152 74.4775515476971 -29.4575352127518 18920.1820608312 T 13 CATAB v2.0e-lin.ifort 2018-Oct-04 07:09:46 2018-Dec-17 19:26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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