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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08983516669484629 4.3806e-08  
a 2.271502375607851 1.239e-08 au
q 2.06744158104738 1.038e-07 au
i 4.145548355699872 6.4113e-06 deg
node 179.6463598551371 5.9902e-05 deg
peri 292.3985705354314 6.9814e-05 deg
M 326.3275051276673 3.5385e-05 deg
tp 2459117.460984324616
(2020-Sep-24.96098432)
0.00012308 TDB
period 1250.455438971898
3.42
1.0231e-05
2.801e-08
d
yr
n .2878951050794625 2.3555e-09 deg/d
Q 2.475563170168321 1.3503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1995-09-22  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61764  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:34:19  

Additional Information
 Earth MOID = 1.08809 au 
 Jupiter MOID = 2.59505 au 
 T_jup = 3.603 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457271.5 (2015-Sep-06.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08902571123700177 4.3698e-08  
q 2.069508594178488 1.0347e-07 au
tp 2457866.058520376015
(2017-Apr-22.55852038)
0.0001233 TDB
node 179.6866816283093 5.9859e-05 deg
peri 292.1419019380233 7.0015e-05 deg
i 4.146342956410666 6.4141e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1995-09-22  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61764  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:34:19  

Additional Information
 Jupiter MOID = 2.59505 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.90950358144207E-15 -4.497377643048174E-15 1.18737226007597E-12 -8.370722039230314E-15 4.203853548615367E-13 -2.475655410149727E-15
q -4.497377643048174E-15 1.070659553258823E-14 -2.555929250371581E-12 1.922060044432347E-14 -9.373445686684566E-13 6.079228148920605E-15
tp 1.18737226007597E-12 -2.555929250371581E-12 1.520192892981963E-8 -1.635677723057193E-11 4.480472944981606E-9 -3.281068396595418E-12
node -8.370722039230314E-15 1.922060044432347E-14 -1.635677723057193E-11 3.583131374042207E-9 -3.57791663282631E-9 3.934042953740605E-11
peri 4.203853548615367E-13 -9.373445686684566E-13 4.480472944981606E-9 -3.57791663282631E-9 4.902062138468462E-9 -4.032250580188754E-11
i -2.475655410149727E-15 6.079228148920605E-15 -3.281068396595418E-12 3.934042953740605E-11 -4.032250580188754E-11 4.114083746425766E-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

[ hide close-approach data ]
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
1955-Sep-06 21:03 < 00:01 Iris 0.0335740978440347 0.0335728277138724 0.0335753706622574 4.82852806487237 4.82852802941113 2435357.376791376 0.878625839073381 845.210234721223 52.4304816328229 87.5782249495715 95673.2222590027 T 14 CATAB v2.0f-lin.ifort 2020-Nov-12 02:34:20 2020-Nov-12 02:34
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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