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146556 (2001 SJ318)
Classification: Main-belt Asteroid          SPK-ID: 2146556
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08605200830041809 4.1466e-08  
a 2.724484150294618 1.6254e-08 au
q 2.490036817579108 1.1538e-07 au
i .9899673163036381 5.307e-06 deg
node 197.1971364368768 0.00024254 deg
peri 209.227876180756 0.00024472 deg
M 25.73980297762979 3.0519e-05 deg
tp 2458883.056881942727
(2020-Feb-03.55688194)
0.00013931 TDB
period 1642.573664505632
4.50
1.47e-05
4.025e-08
d
yr
n .2191682527117283 1.9614e-09 deg/d
Q 2.958931483010128 1.7653e-08 au
  Orbit Determination Parameters
   # obs. used (total)      367  
   data-arc span      6666 days (18.25 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56912  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:26:53  

Additional Information
 Earth MOID = 1.4995 au 
 Jupiter MOID = 2.34812 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457017.5 (2014-Dec-26.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08499594153898568 4.151e-08  
q 2.493208091913965 1.1527e-07 au
tp 2457231.999143258355
(2015-Jul-28.49914326)
0.00014336 TDB
node 197.1947708467483 0.00024327 deg
peri 207.5317003177364 0.0002455 deg
i .9861175046433076 5.3128e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      367  
   data-arc span      6666 days (18.25 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56912  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:26:53  

Additional Information
 Jupiter MOID = 2.34812 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.72309773212037E-15 -4.745199984857013E-15 -1.278622713099111E-12 1.008873221065883E-14 -2.666894425698447E-13 -4.032957918328043E-16
q -4.745199984857013E-15 1.328633215310229E-14 3.175524135901229E-12 -2.641064002441664E-14 6.455763061558827E-13 1.147483649979252E-15
tp -1.278622713099111E-12 3.175524135901229E-12 2.055350985804188E-8 3.050680794497566E-11 4.749902910331317E-9 6.334293349891637E-13
node 1.008873221065883E-14 -2.641064002441664E-14 3.050680794497566E-11 5.918003906893881E-8 -5.916409038953179E-8 -2.6604976401411E-10
peri -2.666894425698447E-13 6.455763061558827E-13 4.749902910331317E-9 -5.916409038953179E-8 6.027179882981467E-8 2.661449792544469E-10
i -4.032957918328043E-16 1.147483649979252E-15 6.334293349891637E-13 -2.6604976401411E-10 2.661449792544469E-10 2.822550090414505E-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 16.5   n/a MPO502887  

146556 (2001 SJ318)          Discovered 2001-Sep-20 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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