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226154 (2002 SD18)
Classification: Main-belt Asteroid          SPK-ID: 2226154
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08983515824837543 4.3976e-08  
a 2.27150237246272 1.2594e-08 au
q 2.067441597370971 1.0437e-07 au
i 4.145553059750855 6.4917e-06 deg
node 179.6463564996133 6.0085e-05 deg
peri 292.3985870810953 7.0125e-05 deg
M 326.3274922469359 3.5857e-05 deg
tp 2459117.461028822756
(2020-Sep-24.96102882)
0.00012474 TDB
period 1250.45543637482
3.42
1.0399e-05
2.847e-08
d
yr
n .2878951056773934 2.3942e-09 deg/d
Q 2.475563147554469 1.3725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      8830 days (24.18 yr)  
   first obs. used      1995-09-22  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62023  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 15:34:40  

Additional Information
 Earth MOID = 1.08809 au 
 Jupiter MOID = 2.59505 au 
 T_jup = 3.603 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457206.5 (2015-Jul-03.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08906054505554453 4.3868e-08  
q 2.069363333144756 1.0403e-07 au
tp 2456615.416284256716
(2013-Nov-18.91628426)
0.00012376 TDB
node 179.6876066082831 6.0044e-05 deg
peri 292.1385880220122 7.0321e-05 deg
i 4.146321536393805 6.4945e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      8830 days (24.18 yr)  
   first obs. used      1995-09-22  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62023  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 15:34:40  

Additional Information
 Jupiter MOID = 2.59505 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.924417558936284E-15 -4.538941381763649E-15 1.266195295463937E-12 -8.476578514488441E-15 4.020266768337443E-13 -2.541522361535692E-15
q -4.538941381763649E-15 1.082264143950402E-14 -2.815652532573118E-12 1.953017054634454E-14 -8.858869074050905E-13 6.262969983085802E-15
tp 1.266195295463937E-12 -2.815652532573118E-12 1.531533198750048E-8 -1.652384766734984E-11 4.539213267769071E-9 -3.495991739759803E-12
node -8.476578514488441E-15 1.953017054634454E-14 -1.652384766734984E-11 3.605225690052791E-9 -3.599942209172083E-9 4.410812307670138E-11
peri 4.020266768337443E-13 -8.858869074050905E-13 4.539213267769071E-9 -3.599942209172083E-9 4.945111184045919E-9 -4.502146773634803E-11
i -2.541522361535692E-15 6.262969983085802E-15 -3.495991739759803E-12 4.410812307670138E-11 -4.502146773634803E-11 4.217885909006272E-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 17.0   n/a MPO450048  

226154 (2002 SD18)          Discovered 2002-Sep-28 by NEAT at Palomar
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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