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226181 (2002 TD157)
Classification: Main-belt Asteroid          SPK-ID: 2226181
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 .179740569572763 5.1441e-08  
a 2.205865123484318 9.3389e-09 au
q 1.809381669788553 1.1314e-07 au
i 7.692474978467244 3.9006e-06 deg
node 102.0527557622067 3.9937e-05 deg
peri 273.9830498155885 4.1588e-05 deg
M 141.0213705672196 1.2545e-05 deg
tp 2458531.741356728298
(2019-Feb-17.24135673)
4.0429e-05 TDB
period 1196.649209258497
3.28
7.5993e-06
2.081e-08
d
yr
n .3008400433599699 1.9105e-09 deg/d
Q 2.602348577180082 1.1017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      433  
   data-arc span      7974 days (21.83 yr)  
   first obs. used      1998-06-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5324  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 10:27:49  

Additional Information
 Earth MOID = .830467 au 
 Jupiter MOID = 2.88971 au 
 T_jup = 3.628 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457235.5 (2015-Aug-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1799397753671163 5.1674e-08  
q 1.80912685169958 1.1374e-07 au
tp 2457333.403243795386
(2015-Nov-06.90324380)
3.7841e-05 TDB
node 102.1383931416176 3.9965e-05 deg
peri 273.5536406555912 4.1591e-05 deg
i 7.69008271852669 3.9006e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      433  
   data-arc span      7974 days (21.83 yr)  
   first obs. used      1998-06-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5324  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 10:27:49  

Additional Information
 Jupiter MOID = 2.88971 au 
 T_jup = 3.628 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.670176589966483E-15 -5.864116553881265E-15 -7.946509541552374E-13 -6.033431292618489E-15 -2.645690546932657E-13 -9.628895604077684E-15
q -5.864116553881265E-15 1.293683074108832E-14 1.821765205332598E-12 1.477453880362561E-14 6.003275120464161E-13 2.152864614357758E-14
tp -7.946509541552374E-13 1.821765205332598E-12 1.43190584354378E-9 7.309083671282399E-12 4.633972122028256E-10 5.105888290070526E-12
node -6.033431292618489E-15 1.477453880362561E-14 7.309083671282399E-12 1.597182286863629E-9 -1.580908276189153E-9 4.243083947823173E-11
peri -2.645690546932657E-13 6.003275120464161E-13 4.633972122028256E-10 -1.580908276189153E-9 1.729792298144756E-9 -4.044624498850734E-11
i -9.628895604077684E-15 2.152864614357758E-14 5.105888290070526E-12 4.243083947823173E-11 -4.044624498850734E-11 1.521482714135732E-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 16.7   n/a MPO454623  

226181 (2002 TD157)          Discovered 2002-Oct-05 by NEAT at Palomar
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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