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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08605195258870825 4.1467e-08  
a 2.724484154488526 1.6401e-08 au
q 2.490036973197792 1.1539e-07 au
i .9899681038109726 5.3339e-06 deg
node 197.19718375 0.00024674 deg
peri 209.2278157436604 0.0002489 deg
M 25.73981013521424 3.075e-05 deg
tp 2458883.056849013606
(2020-Feb-03.55684901)
0.00014035 TDB
period 1642.573668298351
4.50
1.4832e-05
4.061e-08
d
yr
n .2191682522056666 1.979e-09 deg/d
Q 2.958931335779259 1.7812e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6632 days (18.16 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5791  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 11:37:17  

Additional Information
 Earth MOID = 1.4995 au 
 Jupiter MOID = 2.34812 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456964.5 (2014-Nov-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08502503203396533 4.1511e-08  
q 2.493208186264711 1.1529e-07 au
tp 2457231.953171564776
(2015-Jul-28.45317156)
0.00014412 TDB
node 197.19639529617 0.00024749 deg
peri 207.5192742944076 0.0002497 deg
i .9860792631653125 5.3398e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6632 days (18.16 yr)  
   first obs. used      2001-09-20  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5791  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 11:37:17  

Additional Information
 Jupiter MOID = 2.34812 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.723125826422087E-15 -4.745392255801411E-15 -1.277516111205422E-12 8.77875791706251E-15 -2.651513477662072E-13 -3.883431125346149E-16
q -4.745392255801411E-15 1.329145299093343E-14 3.203963761720268E-12 -2.238378745384347E-14 6.472812998228599E-13 1.100998550407353E-15
tp -1.277516111205422E-12 3.203963761720268E-12 2.07703058166233E-8 3.555859612167947E-11 4.787950938502896E-9 5.848693476539875E-13
node 8.77875791706251E-15 -2.238378745384347E-14 3.555859612167947E-11 6.12510202965417E-8 -6.123369297906214E-8 -2.905002539460503E-10
peri -2.651513477662072E-13 6.472812998228599E-13 4.787950938502896E-9 -6.123369297906214E-8 6.234856762426024E-8 2.90581434958199E-10
i -3.883431125346149E-16 1.100998550407353E-15 5.848693476539875E-13 -2.905002539460503E-10 2.90581434958199E-10 2.851341389286293E-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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