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129431 (4355 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2129431
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2413563894601224 8.5221e-08  
a 2.522141502150685 1.076e-08 au
q 1.913406535484066 2.1697e-07 au
i 7.965177184045318 5.9766e-06 deg
node 56.7445058527771 5.0193e-05 deg
peri 301.2993321561689 5.067e-05 deg
M 240.2897636469364 8.31e-06 deg
tp 2459486.998367423386
(2021-Sep-29.49836742)
3.5184e-05 TDB
period 1463.02787136663
4.01
9.362e-06
2.563e-08
d
yr
n .2460650320104429 1.5746e-09 deg/d
Q 3.130876468817305 1.3356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      419  
   data-arc span      15562 days (42.61 yr)  
   first obs. used      1977-10-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60313  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:49:15  

Additional Information
 Earth MOID = .924737 au 
 Jupiter MOID = 2.3566 au 
 T_jup = 3.401 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457495.5 (2016-Apr-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2405430324684735 8.5197e-08  
q 1.916334262901419 2.1671e-07 au
tp 2458024.248098283729
(2017-Sep-27.74809828)
3.189e-05 TDB
node 56.7550967890377 5.0193e-05 deg
peri 301.3701037228597 5.0673e-05 deg
i 7.963733243485588 5.9756e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      419  
   data-arc span      15562 days (42.61 yr)  
   first obs. used      1977-10-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60313  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:49:15  

Additional Information
 Jupiter MOID = 2.3566 au 
 T_jup = 3.401 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.25850234135808E-15 -1.845071250206217E-14 3.369933527981501E-13 1.900988627993199E-14 1.655786013282249E-13 -4.192470328349684E-14
q -1.845071250206217E-14 4.696430341087756E-14 -7.900929253885811E-13 -4.897264277250908E-14 -4.121799084536518E-13 1.0726212451761E-13
tp 3.369933527981501E-13 -7.900929253885811E-13 1.016945793980136E-9 1.221805040434259E-11 2.852390384215746E-10 -2.547558525558093E-12
node 1.900988627993199E-14 -4.897264277250908E-14 1.221805040434259E-11 2.519315402358779E-9 -2.491690379574044E-9 -1.823629073100604E-10
peri 1.655786013282249E-13 -4.121799084536518E-13 2.852390384215746E-10 -2.491690379574044E-9 2.567769497479571E-9 1.794527928100548E-10
i -4.192470328349684E-14 1.0726212451761E-13 -2.547558525558093E-12 -1.823629073100604E-10 1.794527928100548E-10 3.570814345007764E-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 16.5   n/a MPO325369  

129431 (4355 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

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