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129421 (3147 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2129421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2706888461964987 5.5149e-08  
a 3.131058316911269 2.0291e-08 au
q 2.283515753732607 1.7714e-07 au
i 1.523902868881907 7.3422e-06 deg
node 58.64535496778363 0.00023017 deg
peri 272.9942867090647 0.00023061 deg
M 250.7574104541151 1.4258e-05 deg
tp 2459614.579567647549
(2022-Feb-04.07956765)
8.3958e-05 TDB
period 2023.648883389592
5.54
1.9671e-05
5.386e-08
d
yr
n .1778964735211394 1.7293e-09 deg/d
Q 3.978600880089932 2.5783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      336  
   data-arc span      21730 days (59.49 yr)  
   first obs. used      1960-10-22  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:43:55  

Additional Information
 Earth MOID = 1.27364 au 
 Jupiter MOID = 1.40304 au 
 T_jup = 3.155 
[ show covariance matrix ]

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 15.9   n/a MPO469349  

129421 (3147 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 3147 T-3 = 2004 HU57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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